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
index a7a44479..af343c34 100644
--- a/src/main/java/com/back/domain/post/post/controller/PostController.java
+++ b/src/main/java/com/back/domain/post/post/controller/PostController.java
@@ -5,6 +5,8 @@
 import com.back.domain.post.post.dto.response.PostResponseDto;
 import com.back.domain.post.post.service.PostService;
 import com.back.global.rsData.RsData;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
@@ -15,10 +17,12 @@
 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.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 @RequestMapping("/api/posts")
+@Tag(name = "ApiPostController", description = "API 게시글 컨트롤러")
 @RequiredArgsConstructor
 public class PostController {
 
@@ -30,6 +34,7 @@ public class PostController {
    * @return 작성된 게시글 정보
    */
   @PostMapping
+  @Operation(summary = "게시글 작성")
   public RsData<PostResponseDto> createPost(
       @Valid @RequestBody PostCreateRequestDto reqBody
   ) {
@@ -38,11 +43,15 @@ public RsData<PostResponseDto> createPost(
 
   /**
    * 게시글 다건 조회 API
-   * @return 모든 게시글 리스트
+   * @param lastId 마지막으로 조회한 게시글 ID (페이징 처리용, optional)
+   * @return 게시글 목록
    */
   @GetMapping
-  public RsData<List<PostResponseDto>> getAllPosts() {
-    return RsData.successOf(postService.getAllPosts()); // code=200, message="success"
+  @Operation(summary = "게시글 다건 조회")
+  public RsData<List<PostResponseDto>> getAllPosts(
+      @RequestParam(required = false) Long lastId
+  ) {
+    return RsData.successOf(postService.getAllPosts(lastId)); // code=200, message="success"
   }
 
   /**
@@ -51,6 +60,7 @@ public RsData<List<PostResponseDto>> getAllPosts() {
    * @return 해당 ID의 게시글 정보
    */
   @GetMapping("/{postId}")
+  @Operation(summary = "게시글 단건 조회")
   public RsData<PostResponseDto> getPost(
       @PathVariable Long postId
   ) {
@@ -64,6 +74,7 @@ public RsData<PostResponseDto> getPost(
    * @return 수정된 게시글 정보
    */
   @PatchMapping("/{postId}")
+  @Operation(summary = "게시글 수정")
   public RsData<PostResponseDto> updatePost(
       @PathVariable Long postId,
       @Valid @RequestBody PostUpdateRequestDto reqBody
@@ -77,6 +88,7 @@ public RsData<PostResponseDto> updatePost(
    * @return 삭제 성공 메시지
    */
   @DeleteMapping("/{postId}")
+  @Operation(summary = "게시글 삭제")
   public RsData<Void> deletePost(
       @PathVariable Long postId
   ) {
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 d48774c3..ad956f60 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
@@ -1,10 +1,15 @@
 package com.back.domain.post.post.repository;
 
 import com.back.domain.post.post.entity.Post;
+import java.util.List;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 @Repository
 public interface PostRepository extends JpaRepository<Post, Long> {
+  // 첫 페이지 (최신순, id 기준)
+  List<Post> findTop10ByOrderByIdDesc();
 
+  // 이후 페이지 (lastId보다 작은 id들 중 최신순)
+  List<Post> findTop10ByIdLessThanOrderByIdDesc(Long lastId);
 }
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 7ec975d0..22fe7a41 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
@@ -54,8 +54,17 @@ public PostResponseDto createPost(PostCreateRequestDto reqBody) {
 
   // 게시글 다건 조회 로직
   @Transactional(readOnly = true)
-  public List<PostResponseDto> getAllPosts() {
-    List<Post> posts = postRepository.findAll();
+  public List<PostResponseDto> getAllPosts(Long lastId) {
+//    List<Post> posts = postRepository.findAll();
+    List<Post> posts;
+
+    if (lastId == null) {
+      // 첫 페이지 요청
+      posts = postRepository.findTop10ByOrderByIdDesc();
+    } else {
+      // 이후 페이지 요청
+      posts = postRepository.findTop10ByIdLessThanOrderByIdDesc(lastId);
+    }
 
     return posts.stream()
         .map(PostResponseDto::new)