diff --git a/src/main/java/com/back/domain/post/category/entity/Category.java b/src/main/java/com/back/domain/post/category/entity/Category.java
new file mode 100644
index 00000000..6dda2f13
--- /dev/null
+++ b/src/main/java/com/back/domain/post/category/entity/Category.java
@@ -0,0 +1,39 @@
+package com.back.domain.post.category.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Entity
+@Getter
+@Setter
+@Table(name = "category")
+@EntityListeners(AuditingEntityListener.class)
+@NoArgsConstructor(access = lombok.AccessLevel.PROTECTED)
+@AllArgsConstructor
+@Builder
+public class Category {
+  // 각 게시글 카테고리을 구분하는 유일한 번호
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  @Column(name = "id")
+  private Long id;
+
+  // 카테고리 이름
+  @Column(name = "name", nullable = false, unique = true, length = 50)
+  private String name;
+
+  // 카테고리 설명
+  @Column(name = "description", length = 200)
+  private String description;
+}
diff --git a/src/main/java/com/back/domain/post/category/repository/CategoryRepository.java b/src/main/java/com/back/domain/post/category/repository/CategoryRepository.java
new file mode 100644
index 00000000..97e1be2f
--- /dev/null
+++ b/src/main/java/com/back/domain/post/category/repository/CategoryRepository.java
@@ -0,0 +1,10 @@
+package com.back.domain.post.category.repository;
+
+import com.back.domain.post.category.entity.Category;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface CategoryRepository extends JpaRepository<Category, Long> {
+
+}
diff --git a/src/main/java/com/back/domain/post/post/controller/PostController.java b/src/main/java/com/back/domain/post/post/controller/PostController.java
new file mode 100644
index 00000000..346977e8
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/controller/PostController.java
@@ -0,0 +1,45 @@
+package com.back.domain.post.post.controller;
+
+import com.back.domain.post.post.dto.request.PostRequestDto;
+import com.back.domain.post.post.dto.response.PostResponseDto;
+import com.back.domain.post.post.entity.Post;
+import com.back.domain.post.post.service.PostService;
+import com.back.global.rsData.RsData;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/posts")
+@RequiredArgsConstructor
+public class PostController {
+
+  private final PostService postService;
+
+  /**
+   * 게시글 작성 API
+   * @param postRequestDto 게시글 작성 요청 DTO
+   * @return 작성된 게시글 정보
+   */
+  @PostMapping
+  public RsData<PostResponseDto> createPost(
+      @RequestBody PostRequestDto postRequestDto
+  ) {
+    return RsData.successOf(postService.createPost(postRequestDto)); // code=200, message="success"
+  }
+
+  /**
+   * 게시글 다건 조회 API
+   * @return 모든 게시글 리스트
+   */
+  @GetMapping
+  public RsData<List<Post>> getAllPosts() {
+    List<Post> posts = postService.getAllPosts();
+    return RsData.successOf(posts); // code=200, message="success"
+  }
+
+}
diff --git a/src/main/java/com/back/domain/post/post/dto/request/PostRequestDto.java b/src/main/java/com/back/domain/post/post/dto/request/PostRequestDto.java
new file mode 100644
index 00000000..7ddafc49
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/dto/request/PostRequestDto.java
@@ -0,0 +1,13 @@
+package com.back.domain.post.post.dto.request;
+
+import java.util.List;
+
+public record PostRequestDto(
+    Long categoryId,
+    String title,
+    String content,
+    String userNickName,
+    String imageUrl,
+    List<String> tags
+) {
+}
diff --git a/src/main/java/com/back/domain/post/post/dto/response/PostResponseDto.java b/src/main/java/com/back/domain/post/post/dto/response/PostResponseDto.java
new file mode 100644
index 00000000..c527a7b1
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/dto/response/PostResponseDto.java
@@ -0,0 +1,43 @@
+package com.back.domain.post.post.dto.response;
+
+import com.back.domain.post.post.entity.Post;
+import com.back.domain.post.post.enums.PostStatus;
+import java.time.LocalDateTime;
+import java.util.List;
+
+public record PostResponseDto(
+    Long postId,
+    String categoryName,
+    String userNickName,
+    LocalDateTime createdAt,
+    LocalDateTime updatedAt,
+    PostStatus status,
+    String title,
+    String content,
+    String imageUrl,
+    List<String> tags,
+    Integer likeCount,
+    Integer commentCount,
+    Integer viewCount
+) {
+
+  public PostResponseDto(Post post) {
+    this(
+        post.getId(),
+        post.getCategory().getName(),
+        post.getUser().getNickname(),
+        post.getCreatedAt(),
+        post.getUpdatedAt(),
+        post.getStatus(),
+        post.getTitle(),
+        post.getContent(),
+        post.getImageUrl(),
+        post.getPostTags().stream()
+            .map(postTag -> postTag.getTag().getName())
+            .toList(),
+        post.getLikeCount(),
+        post.getCommentCount(),
+        post.getViewCount()
+    );
+  }
+}
\ No newline at end of file
diff --git a/src/main/java/com/back/domain/post/post/entity/Post.java b/src/main/java/com/back/domain/post/post/entity/Post.java
new file mode 100644
index 00000000..275a8667
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/entity/Post.java
@@ -0,0 +1,104 @@
+package com.back.domain.post.post.entity;
+
+import com.back.domain.post.category.entity.Category;
+import com.back.domain.post.post.enums.PostStatus;
+import com.back.domain.user.entity.User;
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.Table;
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Entity
+@Getter
+@Setter
+@Table(name = "post")
+@EntityListeners(AuditingEntityListener.class)
+@NoArgsConstructor(access = lombok.AccessLevel.PROTECTED)
+@AllArgsConstructor
+@Builder
+public class Post {
+
+  // 각 게시글을 구분하는 유일한 번호
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  @Column(name = "id")
+  private Long id;
+
+  // 해당 게시글의 카테고리 고유 식별자
+  @ManyToOne(fetch = FetchType.LAZY)
+  @JoinColumn(name = "category_id")
+  private Category category;
+
+  // 해당 게시글을 작성한 유저의 고유 식별자
+  @ManyToOne(fetch = FetchType.LAZY)
+  @JoinColumn(name = "user_id")
+  private User user;
+
+  // 게시글 작성 날짜
+  @CreatedDate
+  private LocalDateTime createdAt;
+
+  // 게시글 수정 날짜
+  @LastModifiedDate
+  private LocalDateTime updatedAt;
+
+  // 게시글 게시 상태 (기본값: 공개)
+  @Builder.Default
+  @Enumerated(EnumType.STRING)
+  @Column(name = "status", nullable = false)
+  private PostStatus status = PostStatus.PUBLIC;
+
+  // 게시글 제목
+  @Column(name = "title", nullable = false, length = 100)
+  private String title;
+
+  // 게시글 내용
+  @Column(name = "content", nullable = false, columnDefinition = "TEXT")
+  private String content;
+
+  // 게시글 이미지 URL
+  @Column(name = "image_url")
+  private String imageUrl;
+
+  @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true)
+  private List<PostTag> postTags = new ArrayList<>();
+
+  // 게시글 추천 수 (기본값: 0)
+  @Builder.Default
+  @Column(name = "like_count", nullable = false)
+  private Integer likeCount = 0;
+
+  // 게시글 댓글 수
+  @Column(name = "comment_count")
+  private Integer commentCount;
+
+  // 게시글 조회 수
+  @Column(name = "view_count")
+  private Integer viewCount;
+
+  public void addTag(Tag tag) {
+    PostTag postTag = PostTag.create(this, tag);
+    this.postTags.add(postTag);
+  }
+}
diff --git a/src/main/java/com/back/domain/post/post/entity/PostTag.java b/src/main/java/com/back/domain/post/post/entity/PostTag.java
new file mode 100644
index 00000000..9a09a924
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/entity/PostTag.java
@@ -0,0 +1,52 @@
+package com.back.domain.post.post.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Entity
+@Getter
+@Table(name = "post_tag")
+@EntityListeners(AuditingEntityListener.class)
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class PostTag {
+
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  @Column(name = "id")
+  private Long id;
+
+  @ManyToOne(fetch = FetchType.LAZY)
+  @JoinColumn(name = "post_id")
+  private Post post;
+
+  @ManyToOne(fetch = FetchType.LAZY)
+  @JoinColumn(name = "tag_id")
+  private Tag tag;
+
+  @Builder
+  public PostTag(Post post, Tag tag) {
+    this.post = post;
+    this.tag = tag;
+  }
+
+  // 정적 팩토리 메서드
+  public static PostTag create(Post post, Tag tag) {
+    return PostTag.builder()
+        .post(post)
+        .tag(tag)
+        .build();
+  }
+}
diff --git a/src/main/java/com/back/domain/post/post/entity/Tag.java b/src/main/java/com/back/domain/post/post/entity/Tag.java
new file mode 100644
index 00000000..d215e43d
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/entity/Tag.java
@@ -0,0 +1,29 @@
+package com.back.domain.post.post.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@Table(name = "tag")
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor
+@Builder
+public class Tag { // Tag는 Post와 직접적인 관계를 맺지 않습니다.
+
+  @Id
+  @GeneratedValue
+  @Column(name = "id")
+  private Long id;
+
+  @Column(unique = true, nullable = false)
+  private String name;
+}
diff --git a/src/main/java/com/back/domain/post/post/enums/PostStatus.java b/src/main/java/com/back/domain/post/post/enums/PostStatus.java
new file mode 100644
index 00000000..03093b69
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/enums/PostStatus.java
@@ -0,0 +1,15 @@
+package com.back.domain.post.post.enums;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor
+public enum PostStatus {
+  PUBLIC("공개", "모든 사용자가 볼 수 있는 상태"),
+  PRIVATE("비공개", "작성자만 볼 수 있는 상태"),
+  DELETED("삭제됨", "삭제 처리된 게시글 상태");
+
+  private final String title;
+  private final String description;
+}
diff --git a/src/main/java/com/back/domain/post/post/repository/PostRepository.java b/src/main/java/com/back/domain/post/post/repository/PostRepository.java
new file mode 100644
index 00000000..d48774c3
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/repository/PostRepository.java
@@ -0,0 +1,10 @@
+package com.back.domain.post.post.repository;
+
+import com.back.domain.post.post.entity.Post;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface PostRepository extends JpaRepository<Post, Long> {
+
+}
diff --git a/src/main/java/com/back/domain/post/post/repository/TagRepository.java b/src/main/java/com/back/domain/post/post/repository/TagRepository.java
new file mode 100644
index 00000000..18d13e1a
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/repository/TagRepository.java
@@ -0,0 +1,12 @@
+package com.back.domain.post.post.repository;
+
+import com.back.domain.post.post.entity.Tag;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface TagRepository extends JpaRepository<Tag, Long> {
+  // 태그 이름으로 Tag 엔티티를 찾기 위한 메서드
+  Optional<Tag> findByName(String name);
+}
diff --git a/src/main/java/com/back/domain/post/post/service/PostService.java b/src/main/java/com/back/domain/post/post/service/PostService.java
new file mode 100644
index 00000000..f09bed7c
--- /dev/null
+++ b/src/main/java/com/back/domain/post/post/service/PostService.java
@@ -0,0 +1,67 @@
+package com.back.domain.post.post.service;
+
+import com.back.domain.post.category.entity.Category;
+import com.back.domain.post.category.repository.CategoryRepository;
+import com.back.domain.post.post.dto.request.PostRequestDto;
+import com.back.domain.post.post.dto.response.PostResponseDto;
+import com.back.domain.post.post.entity.Post;
+import com.back.domain.post.post.entity.Tag;
+import com.back.domain.post.post.repository.PostRepository;
+import com.back.domain.post.post.repository.TagRepository;
+import com.back.domain.user.entity.User;
+import com.back.global.rq.Rq;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+public class PostService {
+
+  private final PostRepository postRepository;
+  private final CategoryRepository categoryRepository;
+  private final TagRepository tagRepository;
+  private final Rq rq;
+
+  // 게시글 작성 로직
+  @Transactional
+  public PostResponseDto createPost(PostRequestDto postRequestDto) {
+    User user = rq.getActor(); // 현재 로그인한 사용자의 정보 가져오기
+
+    Category category = categoryRepository.findById(postRequestDto.categoryId())
+        .orElseThrow(() -> new IllegalArgumentException("해당 카테고리를 찾을 수 없습니다. ID: " + postRequestDto.categoryId()));
+
+    Post post = Post.builder()
+        .category(category)
+        .user(user)
+        .title(postRequestDto.title())
+        .content(postRequestDto.content())
+        .imageUrl(postRequestDto.imageUrl())
+        .build();
+
+    List<String> tagNames = postRequestDto.tags();
+    if (tagNames != null && !tagNames.isEmpty()) {
+      for (String tagName : tagNames) {
+        // 태그 이름으로 Tag 엔티티를 조회하거나, 없으면 새로 생성하여 저장
+        Tag tag = tagRepository.findByName(tagName)
+            .orElseGet(() -> tagRepository.save(
+                    Tag.builder()
+                        .name(tagName)
+                        .build()
+                )
+            );
+
+        post.addTag(tag);
+      }
+    }
+
+    return new PostResponseDto(postRepository.save(post));
+  }
+
+  // 게시글 다건 조회 로직
+  @Transactional(readOnly = true)
+  public List<Post> getAllPosts() {
+    return postRepository.findAll();
+  }
+}