diff --git a/src/main/java/com/back/domain/post/post/dto/request/PostSortScrollRequestDto.java b/src/main/java/com/back/domain/post/post/dto/request/PostSortScrollRequestDto.java
index f4bec59..7060006 100644
--- a/src/main/java/com/back/domain/post/post/dto/request/PostSortScrollRequestDto.java
+++ b/src/main/java/com/back/domain/post/post/dto/request/PostSortScrollRequestDto.java
@@ -3,6 +3,7 @@
 import com.back.domain.post.post.enums.PostSortStatus;
 
 public record PostSortScrollRequestDto(
+    Long categoryId,
     Long lastId,
     Integer lastLikeCount,
     Integer lastCommentCount,
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
index f315672..a45fed3 100644
--- a/src/main/java/com/back/domain/post/post/repository/PostRepository.java
+++ b/src/main/java/com/back/domain/post/post/repository/PostRepository.java
@@ -8,17 +8,29 @@
 @Repository
 public interface PostRepository extends JpaRepository<Post, Long> {
 
-  // 최신순
+  // 최신순 (카테고리 없음)
   List<Post> findTop10ByOrderByIdDesc();
   List<Post> findTop10ByIdLessThanOrderByIdDesc(Long lastId);
 
-  // 추천순
+  // 추천순 (카테고리 없음)
   List<Post> findTop10ByOrderByLikeCountDescIdDesc();
   List<Post> findTop10ByLikeCountLessThanOrLikeCountEqualsAndIdLessThanOrderByLikeCountDescIdDesc(
       Integer likeCount, Integer likeCount2, Long id);
 
-  // 댓글순
+  // 댓글순 (카테고리 없음)
   List<Post> findTop10ByOrderByCommentCountDescIdDesc();
   List<Post> findTop10ByCommentCountLessThanOrCommentCountEqualsAndIdLessThanOrderByCommentCountDescIdDesc(
       Integer commentCount, Integer commentCount2, Long id);
+
+  // 최신순 (카테고리)
+  List<Post> findTop10ByCategoryIdOrderByIdDesc(Long categoryId);
+  List<Post> findTop10ByCategoryIdAndIdLessThanOrderByIdDesc(Long categoryId, Long id);
+
+  // 추천순 (카테고리)
+  List<Post> findTop10ByCategoryIdOrderByLikeCountDescIdDesc(Long categoryId);
+  List<Post> findTop10ByCategoryIdAndLikeCountLessThanOrLikeCountEqualsAndIdLessThanOrderByLikeCountDescIdDesc(Long categoryId, Integer likeCount, Integer likeCountEquals, Long id);
+
+  // 댓글순 (카테고리)
+  List<Post> findTop10ByCategoryIdOrderByCommentCountDescIdDesc(Long categoryId);
+  List<Post> findTop10ByCategoryIdAndCommentCountLessThanOrCommentCountEqualsAndIdLessThanOrderByCommentCountDescIdDesc(Long categoryId, Integer commentCount, Integer commentCountEquals, Long id);
 }
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
index 8e49745..5dbbe26 100644
--- a/src/main/java/com/back/domain/post/post/service/PostService.java
+++ b/src/main/java/com/back/domain/post/post/service/PostService.java
@@ -101,31 +101,13 @@ public PostResponseDto createPost(PostCreateRequestDto reqBody, List<MultipartFi
   public List<PostResponseDto> getPosts(PostSortScrollRequestDto reqBody) {
     List<Post> posts;
 
-    switch (reqBody.postSortStatus()) {
-      case POPULAR -> {
-        if (reqBody.lastId() == null || reqBody.lastLikeCount() == null) {
-          posts = postRepository.findTop10ByOrderByLikeCountDescIdDesc();
-        } else {
-          posts = postRepository.findTop10ByLikeCountLessThanOrLikeCountEqualsAndIdLessThanOrderByLikeCountDescIdDesc(reqBody.lastLikeCount(), reqBody.lastLikeCount(), reqBody.lastId());
-        }
-      }
-      case COMMENTS -> {
-        if (reqBody.lastId() == null || reqBody.lastCommentCount() == null) {
-          posts = postRepository.findTop10ByOrderByCommentCountDescIdDesc();
-        } else {
-          posts = postRepository.findTop10ByCommentCountLessThanOrCommentCountEqualsAndIdLessThanOrderByCommentCountDescIdDesc(reqBody.lastCommentCount(), reqBody.lastCommentCount(), reqBody.lastId());
-        }
-      }
-      case LATEST -> {
-        if (reqBody.lastId() == null) {
-          // 첫 페이지 요청
-          posts = postRepository.findTop10ByOrderByIdDesc();
-        } else {
-          // 이후 페이지 요청
-          posts = postRepository.findTop10ByIdLessThanOrderByIdDesc(reqBody.lastId());
-        }
-      }
-      default -> throw new IllegalArgumentException("지원하지 않는 정렬 기준: " + reqBody.postSortStatus());
+    // 카테고리 ID 유무에 따른 분기 처리
+    if (reqBody.categoryId() != null) {
+      // 카테고리별 조회 로직
+      posts = findPostsByCategory(reqBody);
+    } else {
+      // 카테고리 없음 (전체) 조회
+      posts = findAllPosts(reqBody);
     }
 
     return posts.stream()
@@ -301,4 +283,67 @@ private void addTag(List<String> tagNames, Post post) {
       post.addTag(tag);
     }
   }
+
+  // 카테고리 없음 (전체) 조회 메서드
+  private List<Post> findAllPosts(PostSortScrollRequestDto reqBody) {
+    return switch (reqBody.postSortStatus()) {
+      case POPULAR -> {
+        if (reqBody.lastId() == null || reqBody.lastLikeCount() == null) {
+          yield postRepository.findTop10ByOrderByLikeCountDescIdDesc();
+        } else {
+          yield postRepository.findTop10ByLikeCountLessThanOrLikeCountEqualsAndIdLessThanOrderByLikeCountDescIdDesc(reqBody.lastLikeCount(), reqBody.lastLikeCount(), reqBody.lastId());
+        }
+      }
+      case COMMENTS -> {
+        if (reqBody.lastId() == null || reqBody.lastCommentCount() == null) {
+          yield postRepository.findTop10ByOrderByCommentCountDescIdDesc();
+        } else {
+          yield postRepository.findTop10ByCommentCountLessThanOrCommentCountEqualsAndIdLessThanOrderByCommentCountDescIdDesc(reqBody.lastCommentCount(), reqBody.lastCommentCount(), reqBody.lastId());
+        }
+      }
+      case LATEST -> {
+        if (reqBody.lastId() == null) {
+          yield postRepository.findTop10ByOrderByIdDesc();
+        } else {
+          yield postRepository.findTop10ByIdLessThanOrderByIdDesc(reqBody.lastId());
+        }
+      }
+      default -> throw new IllegalArgumentException("지원하지 않는 정렬 기준: " + reqBody.postSortStatus());
+    };
+  }
+
+  // 카테고리별 조회 메서드
+  private List<Post> findPostsByCategory(PostSortScrollRequestDto reqBody) {
+    return switch (reqBody.postSortStatus()) {
+      case POPULAR -> {
+        if (reqBody.lastId() == null || reqBody.lastLikeCount() == null) {
+          yield postRepository.findTop10ByCategoryIdOrderByLikeCountDescIdDesc(
+              reqBody.categoryId());
+        } else {
+          yield postRepository.findTop10ByCategoryIdAndLikeCountLessThanOrLikeCountEqualsAndIdLessThanOrderByLikeCountDescIdDesc(
+              reqBody.categoryId(), reqBody.lastLikeCount(), reqBody.lastLikeCount(),
+              reqBody.lastId());
+        }
+      }
+      case COMMENTS -> {
+        if (reqBody.lastId() == null || reqBody.lastCommentCount() == null) {
+          yield postRepository.findTop10ByCategoryIdOrderByCommentCountDescIdDesc(
+              reqBody.categoryId());
+        } else {
+          yield postRepository.findTop10ByCategoryIdAndCommentCountLessThanOrCommentCountEqualsAndIdLessThanOrderByCommentCountDescIdDesc(
+              reqBody.categoryId(), reqBody.lastCommentCount(), reqBody.lastCommentCount(),
+              reqBody.lastId());
+        }
+      }
+      case LATEST -> {
+        if (reqBody.lastId() == null) {
+          yield postRepository.findTop10ByCategoryIdOrderByIdDesc(reqBody.categoryId());
+        } else {
+          yield postRepository.findTop10ByCategoryIdAndIdLessThanOrderByIdDesc(reqBody.categoryId(),
+              reqBody.lastId());
+        }
+      }
+      default -> throw new IllegalArgumentException("지원하지 않는 정렬 기준: " + reqBody.postSortStatus());
+    };
+  }
 }
diff --git a/src/test/java/com/back/domain/post/post/controller/PostControllerTest.java b/src/test/java/com/back/domain/post/post/controller/PostControllerTest.java
index e6d4957..9437e3d 100644
--- a/src/test/java/com/back/domain/post/post/controller/PostControllerTest.java
+++ b/src/test/java/com/back/domain/post/post/controller/PostControllerTest.java
@@ -122,8 +122,8 @@ void getPosts() throws Exception {
       secondPage.add(createSampleResponseDto(i));
     }
 
-    given(postService.getPosts(new PostSortScrollRequestDto(null, 0, 0, PostSortStatus.LATEST))).willReturn(firstPage); // 첫 호출(lastId 없음)
-    given(postService.getPosts(new PostSortScrollRequestDto(21L, 0, 0, PostSortStatus.LATEST))).willReturn(secondPage);
+    given(postService.getPosts(new PostSortScrollRequestDto(1L, null, 0, 0, PostSortStatus.LATEST))).willReturn(firstPage); // 첫 호출(lastId 없음)
+    given(postService.getPosts(new PostSortScrollRequestDto(1L, 21L, 0, 0, PostSortStatus.LATEST))).willReturn(secondPage);
 
     // when & then
     mockMvc.perform(get("/posts"))