diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/admin/member/service/AdminMemberService.java b/src/main/java/com/keunsori/keunsoriserver/domain/admin/member/service/AdminMemberService.java
index 906468e9..48b1635e 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/admin/member/service/AdminMemberService.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/admin/member/service/AdminMemberService.java
@@ -12,7 +12,7 @@
 
 import java.util.List;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.MEMBER_NOT_EXISTS_WITH_STUDENT_ID;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 
 @Service
 @Transactional(readOnly = true)
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/admin/reservation/service/AdminReservationService.java b/src/main/java/com/keunsori/keunsoriserver/domain/admin/reservation/service/AdminReservationService.java
index a89d427e..8e4f79b2 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/admin/reservation/service/AdminReservationService.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/admin/reservation/service/AdminReservationService.java
@@ -23,7 +23,7 @@
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.*;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 
 @Service
 @Transactional(readOnly = true)
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/auth/dto/request/PasswordUpdateLinkSendRequest.java b/src/main/java/com/keunsori/keunsoriserver/domain/auth/dto/request/PasswordUpdateLinkSendRequest.java
index 569adf3a..86649d39 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/auth/dto/request/PasswordUpdateLinkSendRequest.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/auth/dto/request/PasswordUpdateLinkSendRequest.java
@@ -4,12 +4,10 @@
 import jakarta.validation.constraints.Pattern;
 
 import static com.keunsori.keunsoriserver.global.constant.RequestFormatConstant.STUDENT_ID_REGEX;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.EMAIL_INVALID_FORMAT;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.STUDENT_ID_INVALID_FORMAT;
 
 public record PasswordUpdateLinkSendRequest(
-        @Pattern(regexp = STUDENT_ID_REGEX, message = STUDENT_ID_INVALID_FORMAT)
+        @Pattern(regexp = STUDENT_ID_REGEX, message = "학번 형식이 올바르지 않습니다.")
         String studentId,
-        @Email(message = EMAIL_INVALID_FORMAT)
+        @Email(message = "이메일 형식이 올바르지 않습니다.")
         String email
 ) {}
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/auth/dto/request/PasswordUpdateRequest.java b/src/main/java/com/keunsori/keunsoriserver/domain/auth/dto/request/PasswordUpdateRequest.java
index 272dfadc..a8651d26 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/auth/dto/request/PasswordUpdateRequest.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/auth/dto/request/PasswordUpdateRequest.java
@@ -4,11 +4,10 @@
 import jakarta.validation.constraints.Pattern;
 
 import static com.keunsori.keunsoriserver.global.constant.RequestFormatConstant.PASSWORD_REGEX;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.PASSWORD_INVALID_FORMAT;
 
 public record PasswordUpdateRequest(
         @NotNull(message = "비밀번호 변경을 위한 토큰값은 필수입니다.")
         String token,
-        @Pattern(regexp = PASSWORD_REGEX, message = PASSWORD_INVALID_FORMAT)
+        @Pattern(regexp = PASSWORD_REGEX, message = "비밀번호는 특수문자, 영문자, 숫자를 포함한 8자리 이상 문자열입니다.")
         String newPassword
 ) {}
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/auth/login/dto/LoginRequest.java b/src/main/java/com/keunsori/keunsoriserver/domain/auth/login/dto/LoginRequest.java
index 4e32bd1e..3d4c896a 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/auth/login/dto/LoginRequest.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/auth/login/dto/LoginRequest.java
@@ -2,7 +2,6 @@
 
 import static com.keunsori.keunsoriserver.global.constant.RequestFormatConstant.PASSWORD_REGEX;
 import static com.keunsori.keunsoriserver.global.constant.RequestFormatConstant.STUDENT_ID_REGEX;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.PASSWORD_INVALID_FORMAT;
 
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.Pattern;
@@ -19,7 +18,7 @@ public record LoginRequest(
         @NotBlank(message = "비밀번호를 입력해주세요.")
         @Pattern(
                 regexp = PASSWORD_REGEX,
-                message = PASSWORD_INVALID_FORMAT
+                message = "비밀번호는 특수문자, 영문자, 숫자를 포함한 8자리 이상 문자열입니다."
         )
         String password
 ) {}
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/auth/service/AuthService.java b/src/main/java/com/keunsori/keunsoriserver/domain/auth/service/AuthService.java
index d7e3c97e..c5f2b00d 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/auth/service/AuthService.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/auth/service/AuthService.java
@@ -19,9 +19,8 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 import static com.keunsori.keunsoriserver.global.constant.UrlConstant.PASSWORD_CHANGE_LINK;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.STUDENT_ID_NOT_EXISTS;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.*;
 
 @Service
 @Slf4j
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/email/domain/EmailAuthentication.java b/src/main/java/com/keunsori/keunsoriserver/domain/email/domain/EmailAuthentication.java
index 72a23b8c..84566954 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/email/domain/EmailAuthentication.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/email/domain/EmailAuthentication.java
@@ -1,7 +1,5 @@
 package com.keunsori.keunsoriserver.domain.email.domain;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.EMAIL_VERIFY_FAILED;
-
 import org.springframework.data.annotation.Id;
 import org.springframework.data.redis.core.RedisHash;
 
@@ -11,6 +9,8 @@
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
+
 @Getter
 @RedisHash(value = "emailAuthentication", timeToLive = 300)
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/email/service/EmailService.java b/src/main/java/com/keunsori/keunsoriserver/domain/email/service/EmailService.java
index ca7dac52..49fc4b2b 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/email/service/EmailService.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/email/service/EmailService.java
@@ -1,8 +1,5 @@
 package com.keunsori.keunsoriserver.domain.email.service;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.EMAIL_NOT_EXISTS_FOR_AUTH;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.EMAIL_VERIFY_NUMBER_GENERATION_FAILED;
-
 import org.springframework.stereotype.Service;
 
 import com.keunsori.keunsoriserver.domain.email.domain.EmailAuthentication;
@@ -16,6 +13,8 @@
 import java.security.SecureRandom;
 import lombok.RequiredArgsConstructor;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
+
 @Service
 @RequiredArgsConstructor
 public class EmailService {
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/member/domain/Member.java b/src/main/java/com/keunsori/keunsoriserver/domain/member/domain/Member.java
index 5414f77e..95828565 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/member/domain/Member.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/member/domain/Member.java
@@ -12,9 +12,7 @@
 
 import java.time.LocalDateTime;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_STATUS_FOR_APPROVAL;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.STUDENT_ID_DOES_NOT_MATCH_WITH_EMAIL;
-
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 
 @Entity
 @Getter
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/member/dto/request/MemberPasswordUpdateRequest.java b/src/main/java/com/keunsori/keunsoriserver/domain/member/dto/request/MemberPasswordUpdateRequest.java
index c4d5c070..17402eb8 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/member/dto/request/MemberPasswordUpdateRequest.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/member/dto/request/MemberPasswordUpdateRequest.java
@@ -4,13 +4,12 @@
 import jakarta.validation.constraints.Pattern;
 
 import static com.keunsori.keunsoriserver.global.constant.RequestFormatConstant.PASSWORD_REGEX;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.PASSWORD_INVALID_FORMAT;
 
 public record MemberPasswordUpdateRequest(
         @NotBlank(message = "기존 비밀번호를 입력해주세요.")
         String currentPassword,
         @NotBlank(message = "새 비밀번호를 입력해주세요.")
-        @Pattern(regexp = PASSWORD_REGEX, message = PASSWORD_INVALID_FORMAT)
+        @Pattern(regexp = PASSWORD_REGEX, message = "비밀번호는 특수문자, 영문자, 숫자를 포함한 8자리 이상 문자열입니다.")
         String newPassword
 ) {
 }
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/member/dto/request/SignUpRequest.java b/src/main/java/com/keunsori/keunsoriserver/domain/member/dto/request/SignUpRequest.java
index 81a4506a..91d91ba8 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/member/dto/request/SignUpRequest.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/member/dto/request/SignUpRequest.java
@@ -2,7 +2,6 @@
 
 import static com.keunsori.keunsoriserver.global.constant.RequestFormatConstant.PASSWORD_REGEX;
 import static com.keunsori.keunsoriserver.global.constant.RequestFormatConstant.STUDENT_ID_REGEX;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.PASSWORD_INVALID_FORMAT;
 
 import jakarta.validation.constraints.Email;
 import jakarta.validation.constraints.NotBlank;
@@ -23,7 +22,7 @@ public record SignUpRequest(
         String email,
 
         @NotBlank(message = "비밀번호는 필수 입력값입니다.")
-        @Pattern(regexp = PASSWORD_REGEX, message = PASSWORD_INVALID_FORMAT)
+        @Pattern(regexp = PASSWORD_REGEX, message = "비밀번호는 특수문자, 영문자, 숫자를 포함한 8자리 이상 문자열입니다.")
         String password,
 
         @NotBlank(message = "비밀번호를 한 번 더 입력해주세요.")
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/member/service/MemberService.java b/src/main/java/com/keunsori/keunsoriserver/domain/member/service/MemberService.java
index 2f07f679..7027869f 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/member/service/MemberService.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/member/service/MemberService.java
@@ -12,11 +12,7 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import static com.keunsori.keunsoriserver.global.constant.RequestFormatConstant.PASSWORD_REGEX;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.*;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 
 @Service
 @Transactional(readOnly = true)
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/member/service/SignUpService.java b/src/main/java/com/keunsori/keunsoriserver/domain/member/service/SignUpService.java
index 3b837bb9..85ff2850 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/member/service/SignUpService.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/member/service/SignUpService.java
@@ -1,8 +1,5 @@
 package com.keunsori.keunsoriserver.domain.member.service;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.DUPLICATED_EMAIL;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.DUPLICATED_STUDENT_ID;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.PASSWORD_IS_DIFFERENT_FROM_CHECK;
 
 import com.keunsori.keunsoriserver.domain.member.domain.Member;
 import com.keunsori.keunsoriserver.domain.member.repository.MemberRepository;
@@ -15,6 +12,8 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
+
 @Service
 @RequiredArgsConstructor
 public class SignUpService {
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/validator/ReservationValidator.java b/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/validator/ReservationValidator.java
index 128b2f00..c0fb26d8 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/validator/ReservationValidator.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/validator/ReservationValidator.java
@@ -1,11 +1,5 @@
 package com.keunsori.keunsoriserver.domain.reservation.domain.validator;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.ANOTHER_RESERVATION_ALREADY_EXISTS;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_RESERVATION_DATE;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_RESERVATION_TIME;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.RESERVATION_ALREADY_COMPLETED;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.RESERVATION_NOT_EQUAL_MEMBER;
-
 import org.springframework.stereotype.Component;
 
 import com.keunsori.keunsoriserver.domain.member.domain.Member;
@@ -21,6 +15,8 @@
 import java.time.LocalTime;
 import lombok.RequiredArgsConstructor;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
+
 @Component
 @RequiredArgsConstructor
 public class ReservationValidator {
@@ -119,4 +115,4 @@ private void validateReservationDateIsNotPast(LocalDate reservationDate) {
             throw new ReservationException(INVALID_RESERVATION_DATE);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/vo/ReservationType.java b/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/vo/ReservationType.java
index 2f5c65bf..13364aa1 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/vo/ReservationType.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/vo/ReservationType.java
@@ -1,9 +1,9 @@
 package com.keunsori.keunsoriserver.domain.reservation.domain.vo;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_RESERVATION_TYPE;
-
 import com.keunsori.keunsoriserver.global.exception.ReservationException;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
+
 public enum ReservationType {
     TEAM, PERSONAL, LESSON;
 
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/vo/Session.java b/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/vo/Session.java
index 3d92e178..e52ee02f 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/vo/Session.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/reservation/domain/vo/Session.java
@@ -1,9 +1,9 @@
 package com.keunsori.keunsoriserver.domain.reservation.domain.vo;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_SESSION;
-
 import com.keunsori.keunsoriserver.global.exception.ReservationException;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
+
 public enum Session {
     VOCAL, KEYBOARD, DRUM, GUITAR, BASS, ALL;
 
diff --git a/src/main/java/com/keunsori/keunsoriserver/domain/reservation/service/ReservationService.java b/src/main/java/com/keunsori/keunsoriserver/domain/reservation/service/ReservationService.java
index a7e49506..addc7e50 100644
--- a/src/main/java/com/keunsori/keunsoriserver/domain/reservation/service/ReservationService.java
+++ b/src/main/java/com/keunsori/keunsoriserver/domain/reservation/service/ReservationService.java
@@ -1,7 +1,5 @@
 package com.keunsori.keunsoriserver.domain.reservation.service;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.RESERVATION_NOT_EXISTS_WITH_ID;
-
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -23,6 +21,8 @@
 
 import lombok.RequiredArgsConstructor;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
+
 @Service
 @Transactional(readOnly = true)
 @RequiredArgsConstructor
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/exception/AuthException.java b/src/main/java/com/keunsori/keunsoriserver/global/exception/AuthException.java
index a4a1c8f1..518bc10c 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/exception/AuthException.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/exception/AuthException.java
@@ -1,10 +1,12 @@
 package com.keunsori.keunsoriserver.global.exception;
 
-public class AuthException extends RuntimeException {
+import lombok.Getter;
 
-    public AuthException(String message) {
-        super(message);
+@Getter
+public class AuthException extends RuntimeException {
+    private ErrorCode errorCode;
+    public AuthException(ErrorCode errorCode) {
+        super(errorCode.getMassage());
+        this.errorCode = errorCode;
     }
-
-
 }
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/exception/EmailException.java b/src/main/java/com/keunsori/keunsoriserver/global/exception/EmailException.java
index a1a2e3f3..3a3bcc99 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/exception/EmailException.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/exception/EmailException.java
@@ -1,8 +1,12 @@
 package com.keunsori.keunsoriserver.global.exception;
 
-public class EmailException extends RuntimeException {
+import lombok.Getter;
 
-    public EmailException(String message) {
-        super(message);
+@Getter
+public class EmailException extends RuntimeException {
+    private ErrorCode errorCode;
+    public EmailException(ErrorCode errorCode) {
+        super(errorCode.getMassage());
+        this.errorCode = errorCode;
     }
 }
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorCode.java b/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorCode.java
new file mode 100644
index 00000000..a1da82d6
--- /dev/null
+++ b/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorCode.java
@@ -0,0 +1,59 @@
+package com.keunsori.keunsoriserver.global.exception;
+
+import lombok.Getter;
+
+@Getter
+public enum ErrorCode {
+    INVALID_INPUT_VALUE(400, "COMMON-001", "유효성 검증에 실패했습니다."),
+    INTERNAL_SERVER_ERROR(500,"COMMON-002", "서버에서 처리할 수 없습니다."),
+
+    // Member
+    MEMBER_NOT_EXISTS_WITH_STUDENT_ID(404, "MEMBER-001", "해당 학번을 가진 멤버가 존재하지 않습니다."),
+    DUPLICATED_STUDENT_ID(409, "MEMBER-002", "이미 존재하는 학번입니다."),
+    DUPLICATED_EMAIL(409, "MEMBER-003", "이미 존재하는 이메일입니다."),
+    PASSWORD_IS_DIFFERENT_FROM_CHECK(400, "MEMBER-004", "비밀번호와 비밀번호 확인 입력값이 다릅니다."),
+    PASSWORD_INVALID_FORMAT(400, "MEMBER-005", "비밀번호는 특수문자, 영문자, 숫자를 포함한 8자리 이상 문자열입니다."),
+    INVALID_CURRENT_PASSWORD(400, "MEMBER-006", "현재 비밀번호가 올바르지 않습니다."),
+    PASSWORD_SAME_AS_OLD(400, "MEMBER-007", "새 비밀번호가 기존 비밀번호와 동일합니다."),
+    STUDENT_ID_DOES_NOT_MATCH_WITH_EMAIL(400, "MEMBER-008", "가입한 학번과 이메일이 일치하지 않습니다"),
+
+    // Admin Member
+    INVALID_STATUS_FOR_APPROVAL(400, "ADMIN-MEMBER-001", "회원이 승인 대기 상태가 아닙니다."),
+
+    // Reservation
+    RESERVATION_NOT_EXISTS_WITH_ID(404, "RESERVATION-001", "해당 아이디 값을 가진 예약이 존재하지 않습니다."),
+    RESERVATION_NOT_EQUAL_MEMBER(403, "RESERVATION-002", "예약한 멤버가 아닙니다."),
+    RESERVATION_ALREADY_COMPLETED(400, "RESERVATION-003", "확정된 예약은 수정/취소할 수 없습니다."),
+    ANOTHER_RESERVATION_ALREADY_EXISTS(409, "RESERVATION-004", "해당 시간대에 다른 예약이 존재합니다."),
+    INVALID_RESERVATION_TIME(400, "RESERVATION-005", "예약 종료 시간은 예약 시작 시간보다 나중이어야 합니다."),
+    INVALID_RESERVATION_TYPE(400, "RESERVATION-006", "예약 타입이 잘못되었습니다."),
+    INVALID_RESERVATION_DATE(400, "RESERVATION-007", "예약 날짜는 과거 날짜면 안됩니다."),
+    INVALID_SESSION(404, "RESERVATION-008", "존재하지 않는 세션입니다."),
+
+    // Admin Reservation
+    INVALID_DATE_SCHEDULE(400, "ADMIN-RESERVATION-001", "설정하는 날짜가 이미 지난 날짜입니다."),
+    INVALID_SCHEDULE_TIME(400, "ADMIN-RESERVATION-002", "시작 시간과 끝 시간의 순서가 올바르지 않습니다."),
+
+    // Auth
+    STUDENT_ID_NOT_EXISTS(404, "AUTH-001", "존재하지 않는 학번입니다."),
+    INVALID_PASSWORD(401, "AUTH-002", "비밀번호가 일치하지 않습니다.") ,
+    INVALID_REFRESH_TOKEN(401, "AUTH-003", "유효하지 않은 리프레시 토큰입니다."),
+    INVALID_TOKEN(401, "AUTH-004", "유효하지 않은 토큰입니다."),
+    EXPIRED_TOKEN(401, "AUTH-005", "만료된 토큰입니다."),
+
+    // Email
+    EMAIL_NOT_EXISTS_FOR_AUTH(400, "EMAIL-001", "인증번호를 전송하지 않았거나 인증번호가 만료되었습니다."),
+    EMAIL_VERIFY_FAILED(400, "EMAIL-002", "인증번호가 일치하지 않습니다."),
+    EMAIL_VERIFY_NUMBER_GENERATION_FAILED(500, "EMAIL-003", "인증번호 생성중 에러가 발생했습니다.");
+
+
+    private final int status;
+    private final String code;
+    private final String massage;
+
+    ErrorCode(int status, String code, String massage) {
+        this.status = status;
+        this.code = code;
+        this.massage = massage;
+    }
+}
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorMessage.java b/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorMessage.java
deleted file mode 100644
index 9be44558..00000000
--- a/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorMessage.java
+++ /dev/null
@@ -1,47 +0,0 @@
-package com.keunsori.keunsoriserver.global.exception;
-
-public class ErrorMessage {
-    // Member
-    public static final String MEMBER_NOT_EXISTS_WITH_STUDENT_ID = "해당 학번을 가진 멤버가 존재하지 않습니다.";
-    public static final String DUPLICATED_STUDENT_ID = "이미 존재하는 학번입니다.";
-    public static final String DUPLICATED_EMAIL = "이미 존재하는 이메일입니다.";
-    public static final String PASSWORD_IS_DIFFERENT_FROM_CHECK = "비밀번호와 비밀번호 확인 입력값이 다릅니다.";
-    public static final String PASSWORD_INVALID_FORMAT = "비밀번호는 특수문자, 영문자, 숫자를 포함한 8자리 이상 문자열입니다.";
-    public static final String STUDENT_ID_INVALID_FORMAT = "학번 형식이 올바르지 않습니다.";
-    public static final String EMAIL_INVALID_FORMAT = "이메일 형식이 올바르지 않습니다.";
-    public static final String INVALID_CURRENT_PASSWORD = "현재 비밀번호가 올바르지 않습니다.";
-    public static final String STUDENT_ID_DOES_NOT_MATCH_WITH_EMAIL = "가입한 학번과 이메일이 일치하지 않습니다";
-    public static final String PASSWORD_SAME_AS_OLD = "새 비밀번호가 기존 비밀번호와 동일합니다.";
-
-    // Admin Member
-    public static final String INVALID_STATUS_FOR_APPROVAL = "회원이 승인 대기 상태가 아닙니다.";
-
-    // Reservation
-    public static final String RESERVATION_NOT_EXISTS_WITH_ID = "해당 아이디 값을 가진 예약이 존재하지 않습니다.";
-    public static final String RESERVATION_NOT_EQUAL_MEMBER = "예약한 멤버가 아닙니다.";
-    public static final String RESERVATION_ALREADY_COMPLETED = "확정된 예약은 수정/취소할 수 없습니다.";
-    public static final String ANOTHER_RESERVATION_ALREADY_EXISTS = "해당 시간대에 다른 예약이 존재합니다.";
-    public static final String INVALID_RESERVATION_TIME = "예약 종료 시간은 예약 시작 시간보다 나중이어야 합니다.";
-    public static final String INVALID_RESERVATION_TYPE = "예약 타입이 잘못되었습니다.";
-    public static final String INVALID_RESERVATION_DATE = "예약 날짜는 과거 날짜면 안됩니다.";
-    public static final String INVALID_SESSION = "존재하지 않는 세션입니다.";
-
-    // Admin Reservation
-    public static final String INVALID_DATE_SCHEDULE = "설정하는 날짜가 이미 지난 날짜입니다.";
-    public static final String INVALID_SCHEDULE_TIME = "시작 시간과 끝 시간의 순서가 올바르지 않습니다.";
-
-    // Auth
-    public static final String STUDENT_ID_NOT_EXISTS = "존재하지 않는 학번입니다.";
-    public static final String INVALID_PASSWORD = "비밀번호가 일치하지 않습니다.";
-    public static final String INVALID_REFRESH_TOKEN = "유효하지 않은 Refresh-token 입니다.";
-    public static final String INVALID_TOKEN = "유효하지 않은 토큰입니다.";
-    public static final String EXPIRED_TOKEN = "만료된 토큰입니다.";
-
-    // Email
-    public static final String EMAIL_NOT_EXISTS_FOR_AUTH = "인증번호를 전송하지 않았거나 인증번호가 만료되었습니다.";
-    public static final String EMAIL_VERIFY_FAILED = "인증번호가 일치하지 않습니다.";
-    public static final String EMAIL_VERIFY_NUMBER_GENERATION_FAILED = "인증번호 생성중 에러가 발생했습니다.";
-
-    // Random
-    public static final String INITIALIZED_PASSWORD_GENERATION_FAILED = "임시 비밀번호 생성에 실패하였습니다.";
-}
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorResponse.java b/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorResponse.java
index 60c48d44..a5b3841c 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorResponse.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/exception/ErrorResponse.java
@@ -9,6 +9,9 @@ public class ErrorResponse {
     //응답코드
     private int status;
 
+    //에러 구분 코드
+    private String code;
+
     //해당하는 메세지
     private String message;
 }
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/exception/GlobalExceptionHandler.java b/src/main/java/com/keunsori/keunsoriserver/global/exception/GlobalExceptionHandler.java
index b0b780cd..27783b66 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/exception/GlobalExceptionHandler.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/exception/GlobalExceptionHandler.java
@@ -2,6 +2,7 @@
 
 import org.springframework.context.support.DefaultMessageSourceResolvable;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.HttpStatusCode;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
@@ -22,46 +23,47 @@ public ResponseEntity<ErrorResponse> handleMethodArgumentNotValidException(Metho
                 .findFirst()
                 .map(DefaultMessageSourceResolvable::getDefaultMessage)
                 .orElse("유효성 검사 실패");
-
-        ErrorResponse response = new ErrorResponse(HttpStatus.BAD_REQUEST.value(),errorMessage);
+        ErrorCode errorCode = ErrorCode.INVALID_INPUT_VALUE;
+        ErrorResponse response = new ErrorResponse(errorCode.getStatus(), errorCode.getCode(), errorMessage);
         log.info(ex.getMessage());
-        return new ResponseEntity<>(response,HttpStatus.BAD_REQUEST);
+        return new ResponseEntity<>(response,HttpStatus.valueOf(errorCode.getStatus()));
     }
 
     //Member 도메인 예외처리(400)
     @ExceptionHandler(MemberException.class)
     public ResponseEntity<ErrorResponse> handleMemberException(MemberException ex) {
-        ErrorResponse response = new ErrorResponse(HttpStatus.BAD_REQUEST.value(), ex.getMessage());
+        ErrorResponse response = new ErrorResponse(ex.getErrorCode().getStatus(), ex.getErrorCode().getCode(), ex.getMessage());
         log.info(ex.getMessage());
-        return new ResponseEntity<>(response,HttpStatus.BAD_REQUEST);
+        return new ResponseEntity<>(response, HttpStatusCode.valueOf(ex.getErrorCode().getStatus()));
     }
 
     //Auth 도메인 예외처리(401)
     @ExceptionHandler(AuthException.class)
     public ResponseEntity<ErrorResponse> handleAuthException(AuthException ex) {
-        ErrorResponse response = new ErrorResponse(HttpStatus.UNAUTHORIZED.value(), ex.getMessage());
+        ErrorResponse response = new ErrorResponse(ex.getErrorCode().getStatus(), ex.getErrorCode().getCode(), ex.getMessage());
         log.info(ex.getMessage());
-        return new ResponseEntity<>(response,HttpStatus.UNAUTHORIZED);
+        return new ResponseEntity<>(response,HttpStatusCode.valueOf(ex.getErrorCode().getStatus()));
     }
 
     @ExceptionHandler(ReservationException.class)
     public ResponseEntity<ErrorResponse> handleReservationException(ReservationException ex) {
-        ErrorResponse response = new ErrorResponse(HttpStatus.BAD_REQUEST.value(), ex.getMessage());
+        ErrorResponse response = new ErrorResponse(ex.getErrorCode().getStatus(), ex.getErrorCode().getCode(), ex.getMessage());
         log.info(ex.getMessage());
-        return ResponseEntity.badRequest().body(response);
+        return new ResponseEntity<>(response, HttpStatusCode.valueOf(ex.getErrorCode().getStatus()));
     }
 
     @ExceptionHandler(EmailException.class)
     public ResponseEntity<ErrorResponse> handleEmailException(ReservationException ex) {
-        ErrorResponse response = new ErrorResponse(HttpStatus.BAD_REQUEST.value(), ex.getMessage());
+        ErrorResponse response = new ErrorResponse(ex.getErrorCode().getStatus(), ex.getErrorCode().getCode(), ex.getMessage());
         log.info(ex.getMessage());
-        return ResponseEntity.badRequest().body(response);
+        return new ResponseEntity<>(response, HttpStatusCode.valueOf(ex.getErrorCode().getStatus()));
     }
 
     @ExceptionHandler(Exception.class)
     public ResponseEntity<ErrorResponse> handleException(Exception ex) {
-        ErrorResponse response = new ErrorResponse(HttpStatus.INTERNAL_SERVER_ERROR.value(), ex.getMessage());
+        ErrorCode errorCode = ErrorCode.INTERNAL_SERVER_ERROR;
+        ErrorResponse response = new ErrorResponse(errorCode.getStatus(), errorCode.getCode(), ex.getMessage());
         log.error(ex.getMessage(), ex);
-        return ResponseEntity.internalServerError().body(response);
+        return new ResponseEntity<>(response, HttpStatusCode.valueOf(errorCode.getStatus()));
     }
 }
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/exception/MemberException.java b/src/main/java/com/keunsori/keunsoriserver/global/exception/MemberException.java
index 3f99260b..b911e6aa 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/exception/MemberException.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/exception/MemberException.java
@@ -1,7 +1,13 @@
 package com.keunsori.keunsoriserver.global.exception;
 
+import lombok.Getter;
+
+@Getter
 public class MemberException extends RuntimeException {
-    public MemberException(String message) {
-        super(message);
+    private ErrorCode errorCode;
+
+    public MemberException(ErrorCode errorCode) {
+        super(errorCode.getMassage());
+        this.errorCode = errorCode;
     }
 }
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/exception/ReservationException.java b/src/main/java/com/keunsori/keunsoriserver/global/exception/ReservationException.java
index 01a6bf8f..c3c1876c 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/exception/ReservationException.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/exception/ReservationException.java
@@ -1,8 +1,12 @@
 package com.keunsori.keunsoriserver.global.exception;
 
-public class ReservationException extends RuntimeException {
+import lombok.Getter;
 
-    public ReservationException(String errorMessage) {
-        super(errorMessage);
+@Getter
+public class ReservationException extends RuntimeException {
+    private ErrorCode errorCode;
+    public ReservationException(ErrorCode errorCode) {
+        super(errorCode.getMassage());
+        this.errorCode = errorCode;
     }
 }
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/security/JwtAuthenticationFilter.java b/src/main/java/com/keunsori/keunsoriserver/global/security/JwtAuthenticationFilter.java
index 80f9f68a..f949ddd8 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/security/JwtAuthenticationFilter.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/security/JwtAuthenticationFilter.java
@@ -20,8 +20,7 @@
 import java.io.IOException;
 import java.util.List;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_REFRESH_TOKEN;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.STUDENT_ID_NOT_EXISTS;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 
 @Component
 @RequiredArgsConstructor
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/util/MemberUtil.java b/src/main/java/com/keunsori/keunsoriserver/global/util/MemberUtil.java
index 1cb4932d..33314387 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/util/MemberUtil.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/util/MemberUtil.java
@@ -1,7 +1,5 @@
 package com.keunsori.keunsoriserver.global.util;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.MEMBER_NOT_EXISTS_WITH_STUDENT_ID;
-
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.stereotype.Component;
@@ -12,6 +10,8 @@
 
 import lombok.RequiredArgsConstructor;
 
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
+
 @Component
 @RequiredArgsConstructor
 public class MemberUtil {
diff --git a/src/main/java/com/keunsori/keunsoriserver/global/util/TokenUtil.java b/src/main/java/com/keunsori/keunsoriserver/global/util/TokenUtil.java
index d210ea12..25ac10c3 100644
--- a/src/main/java/com/keunsori/keunsoriserver/global/util/TokenUtil.java
+++ b/src/main/java/com/keunsori/keunsoriserver/global/util/TokenUtil.java
@@ -1,7 +1,6 @@
 package com.keunsori.keunsoriserver.global.util;
 
 import com.keunsori.keunsoriserver.domain.member.domain.vo.MemberStatus;
-import com.keunsori.keunsoriserver.global.constant.TokenConstant;
 import com.keunsori.keunsoriserver.global.exception.AuthException;
 import com.keunsori.keunsoriserver.global.properties.JwtProperties;
 import io.jsonwebtoken.Claims;
@@ -9,16 +8,13 @@
 import io.jsonwebtoken.Jwts;
 import io.jsonwebtoken.SignatureAlgorithm;
 import lombok.RequiredArgsConstructor;
-import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.stereotype.Component;
 
 import java.util.Date;
 
-
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 import static com.keunsori.keunsoriserver.domain.member.domain.vo.MemberStatus.일반;
 import static com.keunsori.keunsoriserver.global.constant.TokenConstant.PASSWORD_UPDATE_TOKEN_VALIDITY_TIME;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.EXPIRED_TOKEN;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_TOKEN;
 
 @Component
 @RequiredArgsConstructor
diff --git a/src/test/java/com/keunsori/keunsoriserver/admin/member/api/AdminMemberApiTest.java b/src/test/java/com/keunsori/keunsoriserver/admin/member/api/AdminMemberApiTest.java
index ea0a9f10..c9ade716 100644
--- a/src/test/java/com/keunsori/keunsoriserver/admin/member/api/AdminMemberApiTest.java
+++ b/src/test/java/com/keunsori/keunsoriserver/admin/member/api/AdminMemberApiTest.java
@@ -12,7 +12,7 @@
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.*;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 import static io.restassured.RestAssured.given;
 import static org.springframework.http.HttpHeaders.AUTHORIZATION;
 import static org.springframework.http.HttpHeaders.CONTENT_TYPE;
@@ -72,7 +72,7 @@ void login() throws JsonProcessingException {
                 extract().
                 jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_CURRENT_PASSWORD);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_CURRENT_PASSWORD.getMassage());
     }
 
     @Test
@@ -113,11 +113,11 @@ void login() throws JsonProcessingException {
                         when().
                         delete("/admin/members/0").
                         then().
-                        statusCode(HttpStatus.SC_BAD_REQUEST).
+                        statusCode(HttpStatus.SC_NOT_FOUND).
                         extract().
                         jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(MEMBER_NOT_EXISTS_WITH_STUDENT_ID);
+        Assertions.assertThat(errorMessage).isEqualTo(MEMBER_NOT_EXISTS_WITH_STUDENT_ID.getMassage());
     }
 
     @Test
@@ -170,6 +170,6 @@ void login() throws JsonProcessingException {
                         extract().
                         jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_STATUS_FOR_APPROVAL);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_STATUS_FOR_APPROVAL.getMassage());
     }
 }
diff --git a/src/test/java/com/keunsori/keunsoriserver/admin/reservation/api/AdminReservationApiTest.java b/src/test/java/com/keunsori/keunsoriserver/admin/reservation/api/AdminReservationApiTest.java
index 9885c950..f5701f41 100644
--- a/src/test/java/com/keunsori/keunsoriserver/admin/reservation/api/AdminReservationApiTest.java
+++ b/src/test/java/com/keunsori/keunsoriserver/admin/reservation/api/AdminReservationApiTest.java
@@ -20,7 +20,7 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.*;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 import static io.restassured.RestAssured.given;
 import static org.springframework.http.HttpHeaders.AUTHORIZATION;
 import static org.springframework.http.HttpHeaders.CONTENT_TYPE;
@@ -121,7 +121,7 @@ void login() throws JsonProcessingException {
                         extract().
                         jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_SCHEDULE_TIME);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_SCHEDULE_TIME.getMassage());
     }
 
     @Test
@@ -148,7 +148,7 @@ void login() throws JsonProcessingException {
                         extract().
                         jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_SCHEDULE_TIME);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_SCHEDULE_TIME.getMassage());
     }
 
     @Test
@@ -166,7 +166,7 @@ void login() throws JsonProcessingException {
                         statusCode(HttpStatus.SC_BAD_REQUEST).
                         extract().
                         jsonPath().get("message");
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_DATE_SCHEDULE);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_DATE_SCHEDULE.getMassage());
     }
     @Test
     void 종료시간이_시작시간보다_앞서는_경우_일자별_설정에_실패한다() throws JsonProcessingException {
@@ -184,7 +184,7 @@ void login() throws JsonProcessingException {
                         extract().
                         jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_SCHEDULE_TIME);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_SCHEDULE_TIME.getMassage());
     }
 
     @Test
@@ -275,6 +275,6 @@ void login() throws JsonProcessingException {
                         .extract()
                         .jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(RESERVATION_ALREADY_COMPLETED);
+        Assertions.assertThat(errorMessage).isEqualTo(RESERVATION_ALREADY_COMPLETED.getMassage());
     }
 }
diff --git a/src/test/java/com/keunsori/keunsoriserver/auth/service/AuthServiceTest.java b/src/test/java/com/keunsori/keunsoriserver/auth/service/AuthServiceTest.java
index f844abc0..add49c4a 100644
--- a/src/test/java/com/keunsori/keunsoriserver/auth/service/AuthServiceTest.java
+++ b/src/test/java/com/keunsori/keunsoriserver/auth/service/AuthServiceTest.java
@@ -17,8 +17,7 @@
 
 import java.util.Optional;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.MEMBER_NOT_EXISTS_WITH_STUDENT_ID;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.STUDENT_ID_DOES_NOT_MATCH_WITH_EMAIL;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.times;
@@ -79,7 +78,7 @@ public class AuthServiceTest {
         // when & then
         Assertions.assertThatThrownBy(() -> authService.sendPasswordUpdateLink(request))
                 .isInstanceOf(MemberException.class)
-                .hasMessage(MEMBER_NOT_EXISTS_WITH_STUDENT_ID);
+                .hasMessage(MEMBER_NOT_EXISTS_WITH_STUDENT_ID.getMassage());
     }
 
     @Test
@@ -101,6 +100,6 @@ public class AuthServiceTest {
         // when & then
         Assertions.assertThatThrownBy(() -> authService.sendPasswordUpdateLink(request))
                 .isInstanceOf(MemberException.class)
-                .hasMessage(STUDENT_ID_DOES_NOT_MATCH_WITH_EMAIL);
+                .hasMessage(STUDENT_ID_DOES_NOT_MATCH_WITH_EMAIL.getMassage());
     }
 }
diff --git a/src/test/java/com/keunsori/keunsoriserver/member/api/MemberApiTest.java b/src/test/java/com/keunsori/keunsoriserver/member/api/MemberApiTest.java
index 3c62c7d8..63e82baf 100644
--- a/src/test/java/com/keunsori/keunsoriserver/member/api/MemberApiTest.java
+++ b/src/test/java/com/keunsori/keunsoriserver/member/api/MemberApiTest.java
@@ -1,6 +1,6 @@
 package com.keunsori.keunsoriserver.member.api;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.*;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 import static io.restassured.RestAssured.given;
 import static org.springframework.http.HttpHeaders.AUTHORIZATION;
 import static org.springframework.http.HttpHeaders.CONTENT_TYPE;
@@ -49,10 +49,11 @@ void login() throws JsonProcessingException {
         .when()
                 .post("/signup")
         .then()
-                .statusCode(400)
-                .extract().jsonPath().getString("message");
+                .statusCode(409)
+                .extract().jsonPath().
+                getString("message");
 
-        Assertions.assertThat(message).isEqualTo(DUPLICATED_STUDENT_ID);
+        Assertions.assertThat(message).isEqualTo(DUPLICATED_STUDENT_ID.getMassage());
     }
 
     @Test
@@ -88,10 +89,10 @@ void login() throws JsonProcessingException {
                         .when()
                         .post("/signup")
                         .then()
-                        .statusCode(400)
+                        .statusCode(409)
                         .extract().jsonPath().getString("message");
 
-        Assertions.assertThat(message).isEqualTo(DUPLICATED_STUDENT_ID);
+        Assertions.assertThat(message).isEqualTo(DUPLICATED_STUDENT_ID.getMassage());
     }
 
 
@@ -138,7 +139,7 @@ void login() throws JsonProcessingException {
                 extract().
                 jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_CURRENT_PASSWORD);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_CURRENT_PASSWORD.getMassage());
     }
 
     @Test
@@ -146,7 +147,6 @@ void login() throws JsonProcessingException {
         MemberPasswordUpdateRequest request = new MemberPasswordUpdateRequest("test123!",
                 "test123!");
 
-
         String errorMessage = given().
                 header(AUTHORIZATION, authorizationValue).
                 header(CONTENT_TYPE, "application/json").
@@ -158,7 +158,7 @@ void login() throws JsonProcessingException {
                 extract().
                 jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(PASSWORD_SAME_AS_OLD);
+        Assertions.assertThat(errorMessage).isEqualTo(PASSWORD_SAME_AS_OLD.getMassage());
     }
 
 
@@ -179,6 +179,6 @@ void login() throws JsonProcessingException {
                 extract().
                 jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(PASSWORD_INVALID_FORMAT);
+        Assertions.assertThat(errorMessage).isEqualTo(PASSWORD_INVALID_FORMAT.getMassage());
     }
 }
diff --git a/src/test/java/com/keunsori/keunsoriserver/reservation/api/ReservationApiTest.java b/src/test/java/com/keunsori/keunsoriserver/reservation/api/ReservationApiTest.java
index d5c90907..a989a51e 100644
--- a/src/test/java/com/keunsori/keunsoriserver/reservation/api/ReservationApiTest.java
+++ b/src/test/java/com/keunsori/keunsoriserver/reservation/api/ReservationApiTest.java
@@ -1,8 +1,6 @@
 package com.keunsori.keunsoriserver.reservation.api;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.ANOTHER_RESERVATION_ALREADY_EXISTS;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_RESERVATION_TIME;
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.RESERVATION_ALREADY_COMPLETED;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 import static io.restassured.RestAssured.given;
 import static org.springframework.http.HttpHeaders.AUTHORIZATION;
 import static org.springframework.http.HttpHeaders.CONTENT_TYPE;
@@ -135,7 +133,7 @@ void login() throws JsonProcessingException {
                     extract().
                     jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_RESERVATION_TIME);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_RESERVATION_TIME.getMassage());
     }
 
     @Test
@@ -160,7 +158,7 @@ void login() throws JsonProcessingException {
                         extract().
                         jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(INVALID_RESERVATION_TIME);
+        Assertions.assertThat(errorMessage).isEqualTo(INVALID_RESERVATION_TIME.getMassage());
     }
 
     static Stream<Arguments> overlapReservationTimeTestData() {
@@ -209,11 +207,11 @@ static Stream<Arguments> overlapReservationTimeTestData() {
         when().
                 post("/reservation").
         then().
-                statusCode(HttpStatus.SC_BAD_REQUEST).
+                statusCode(HttpStatus.SC_CONFLICT).
                 extract().
                 jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(ANOTHER_RESERVATION_ALREADY_EXISTS);
+        Assertions.assertThat(errorMessage).isEqualTo(ANOTHER_RESERVATION_ALREADY_EXISTS.getMassage());
     }
 
     @ParameterizedTest
@@ -289,7 +287,7 @@ static Stream<Arguments> overlapReservationTimeTestData() {
         when().
                 post("/reservation").
         then().
-                statusCode(HttpStatus.SC_BAD_REQUEST);
+                statusCode(HttpStatus.SC_CONFLICT);
     }
 
     @ParameterizedTest
@@ -328,11 +326,11 @@ static Stream<Arguments> overlapReservationTimeTestData() {
                 when().
                         post("/reservation").
                 then().
-                        statusCode(HttpStatus.SC_BAD_REQUEST).
+                        statusCode(HttpStatus.SC_CONFLICT).
                         extract().
                         jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(ANOTHER_RESERVATION_ALREADY_EXISTS);
+        Assertions.assertThat(errorMessage).isEqualTo(ANOTHER_RESERVATION_ALREADY_EXISTS.getMassage());
     }
 
     @ParameterizedTest
@@ -370,7 +368,7 @@ static Stream<Arguments> overlapReservationTimeTestData() {
         when().
                 post("/reservation").
         then().
-                statusCode(HttpStatus.SC_BAD_REQUEST);
+                statusCode(HttpStatus.SC_CONFLICT);
     }
 
     static Stream<Arguments> successReservationTimeTestData() {
@@ -471,6 +469,6 @@ static Stream<Arguments> successReservationTimeTestData() {
                         extract().
                         jsonPath().get("message");
 
-        Assertions.assertThat(errorMessage).isEqualTo(RESERVATION_ALREADY_COMPLETED);
+        Assertions.assertThat(errorMessage).isEqualTo(RESERVATION_ALREADY_COMPLETED.getMassage());
     }
 }
diff --git a/src/test/java/com/keunsori/keunsoriserver/reservation/domain/ReservationTypeTest.java b/src/test/java/com/keunsori/keunsoriserver/reservation/domain/ReservationTypeTest.java
index 54c669c3..35ae01d5 100644
--- a/src/test/java/com/keunsori/keunsoriserver/reservation/domain/ReservationTypeTest.java
+++ b/src/test/java/com/keunsori/keunsoriserver/reservation/domain/ReservationTypeTest.java
@@ -1,6 +1,6 @@
 package com.keunsori.keunsoriserver.reservation.domain;
 
-import static com.keunsori.keunsoriserver.global.exception.ErrorMessage.INVALID_RESERVATION_TYPE;
+import static com.keunsori.keunsoriserver.global.exception.ErrorCode.*;
 
 import org.assertj.core.api.Assertions;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -47,6 +47,6 @@ public static Stream<Arguments> reservationConvertTestData() {
         Assertions.assertThatThrownBy(
                         () -> ReservationType.from(actual))
                 .isInstanceOf(ReservationException.class)
-                .hasMessage(INVALID_RESERVATION_TYPE);
+                .hasMessage(INVALID_RESERVATION_TYPE.getMassage());
     }
 }