diff --git a/src/main/java/com/example/helloworldmvc/config/SwaggerConfig.java b/src/main/java/com/example/helloworldmvc/config/SwaggerConfig.java
index 35a796e..4928b9c 100644
--- a/src/main/java/com/example/helloworldmvc/config/SwaggerConfig.java
+++ b/src/main/java/com/example/helloworldmvc/config/SwaggerConfig.java
@@ -33,7 +33,7 @@ public OpenAPI helloWorldMVCAPI(){
                         .in(SecurityScheme.In.HEADER));
 
         return new OpenAPI()
-                .addServersItem(new Server().url("/mvc"))
+                .addServersItem(new Server().url("/"))
                 .info(info)
                 .addSecurityItem(securityRequirement)
                 .components(components);
diff --git a/src/main/java/com/example/helloworldmvc/converter/CommunityConverter.java b/src/main/java/com/example/helloworldmvc/converter/CommunityConverter.java
index 9d3829d..f836f72 100644
--- a/src/main/java/com/example/helloworldmvc/converter/CommunityConverter.java
+++ b/src/main/java/com/example/helloworldmvc/converter/CommunityConverter.java
@@ -5,6 +5,7 @@
 import com.example.helloworldmvc.domain.enums.CommunityCategory;
 import com.example.helloworldmvc.web.dto.CommunityRequestDTO;
 import com.example.helloworldmvc.web.dto.CommunityResponseDTO;
+import com.example.helloworldmvc.web.dto.FileDTO;
 import org.springframework.data.domain.Page;
 
 import java.util.ArrayList;
@@ -27,14 +28,14 @@ public static CommunityResponseDTO.CreatedPostDTO toCreatedPostDTO(Community com
                 .build();
     }
 
-    public static CommunityResponseDTO.PostListDTO toPostListDTO(Page<Community> postList){
-        List<CommunityResponseDTO.PostDTO> posts = postList.stream().map(CommunityConverter::toPostDTO).toList();
+    public static CommunityResponseDTO.PostListDTO toPostListDTO(Page<Community> postList, Long categoryId){
+        List<CommunityResponseDTO.PostDTO> posts = postList.stream().map(i -> CommunityConverter.toPostDTO(i, categoryId)).toList();
         return CommunityResponseDTO.PostListDTO.builder()
                 .postDTOList(posts)
                 .build();
     }
 
-    public static CommunityResponseDTO.PostDTO toPostDTO(Community community){
+    public static CommunityResponseDTO.PostDTO toPostDTO(Community community, Long categoryId){
         String imageUrl = null;
         if(!community.getFileList().isEmpty()){
             imageUrl = community.getFileList().get(0).getUrl();
@@ -45,19 +46,24 @@ public static CommunityResponseDTO.PostDTO toPostDTO(Community community){
                 .created_at(community.getCreatedAt())
                 .commentNum(community.getCommentList().size())
                 .imageUrl(imageUrl)
+                .content(community.getContent())
+                .category_id(categoryId)
                 .build();
     }
 
     public static CommunityResponseDTO.PostDetailDTO toPostDetailDTO(Community community, Page<Comment> commentList){
-        List<String> list = new ArrayList<>();
+        List<FileDTO.FileDetailRes> list = new ArrayList<FileDTO.FileDetailRes>();
         if(!community.getFileList().isEmpty()){
-            community.getFileList().stream().map(file -> list.add(file.getUrl())).collect(Collectors.toList());
+            community.getFileList().stream().forEach(file -> {
+                list.add(FileConverter.toFileDetailRes(file.getUrl(), file.getFileType()));
+            });
         }
-        else list.add("NULL");
+        else list.add(FileConverter.toFileDetailRes("",""));
         List<CommunityResponseDTO.CommentDTO> comments = commentList.stream().map(CommunityConverter::toCommentDTO).toList();
         return CommunityResponseDTO.PostDetailDTO.builder()
                 .title(community.getTitle())
                 .content(community.getContent())
+                .communityWriterEmail(community.getUser().getEmail())
                 .created_at(community.getCreatedAt())
                 .fileList(list)
                 .commentDTOList(comments)
@@ -67,6 +73,7 @@ public static CommunityResponseDTO.PostDetailDTO toPostDetailDTO(Community commu
     public static CommunityResponseDTO.CommentDTO toCommentDTO(Comment comment){
         return CommunityResponseDTO.CommentDTO.builder()
                 .anonymousName(comment.getAnonymous())
+                .commentWriterEmail(comment.getUser().getEmail())
                 .created_at(comment.getCreatedAt())
                 .content(comment.getContent())
                 .build();
diff --git a/src/main/java/com/example/helloworldmvc/converter/FileConverter.java b/src/main/java/com/example/helloworldmvc/converter/FileConverter.java
index 02f7e6e..2f964d6 100644
--- a/src/main/java/com/example/helloworldmvc/converter/FileConverter.java
+++ b/src/main/java/com/example/helloworldmvc/converter/FileConverter.java
@@ -4,13 +4,21 @@
 import com.example.helloworldmvc.domain.Community;
 import com.example.helloworldmvc.domain.File;
 import com.example.helloworldmvc.domain.User;
+import com.example.helloworldmvc.web.dto.FileDTO;
 
 public class FileConverter {
-    public static File toFile(String pictureUrl, User user, Center center) {
+    public static File toFile(String pictureUrl, String fileType, User user, Center center) {
         return File.builder()
                 .url(pictureUrl)
+                .fileType(fileType)
                 .user(user)
                 .center(center)
                 .build();
     }
+    public static FileDTO.FileDetailRes toFileDetailRes(String pictureUrl, String fileType) {
+        return FileDTO.FileDetailRes.builder()
+                .fileUrl(pictureUrl)
+                .fileType(fileType)
+                .build();
+    }
 }
diff --git a/src/main/java/com/example/helloworldmvc/domain/File.java b/src/main/java/com/example/helloworldmvc/domain/File.java
index c5d94f1..c93a790 100644
--- a/src/main/java/com/example/helloworldmvc/domain/File.java
+++ b/src/main/java/com/example/helloworldmvc/domain/File.java
@@ -15,6 +15,8 @@ public class File {
 
     private String url;
 
+    private String fileType;
+
     @OneToOne
     @JoinColumn(name = "user_id")
     private User user;
diff --git a/src/main/java/com/example/helloworldmvc/service/CommunityServiceImpl.java b/src/main/java/com/example/helloworldmvc/service/CommunityServiceImpl.java
index 073d456..10c5906 100644
--- a/src/main/java/com/example/helloworldmvc/service/CommunityServiceImpl.java
+++ b/src/main/java/com/example/helloworldmvc/service/CommunityServiceImpl.java
@@ -51,7 +51,7 @@ public CommunityResponseDTO.PostListDTO getCommunityList(String userId, Long cat
         User user = userRepository.findByEmail(userId).orElseThrow(() -> new GeneralException(ErrorStatus.USER_NOT_FOUND));
         CommunityCategory communityCategory = CommunityConverter.toCommunityCategory(categoryId);
         Page<Community> communityList = communityRepository.findAllByCommunityCategory(communityCategory, PageRequest.of(page, size));
-        return CommunityConverter.toPostListDTO(communityList);
+        return CommunityConverter.toPostListDTO(communityList, categoryId);
     }
 
     @Override
diff --git a/src/main/java/com/example/helloworldmvc/service/S3Service.java b/src/main/java/com/example/helloworldmvc/service/S3Service.java
index a57e6a8..3cb31e8 100644
--- a/src/main/java/com/example/helloworldmvc/service/S3Service.java
+++ b/src/main/java/com/example/helloworldmvc/service/S3Service.java
@@ -25,7 +25,8 @@ public class S3Service {
 
     public File setImage(MultipartFile file, User user){
         String pictureUrl = s3Manager.uploadFile(s3Manager.generateUserKeyName(createFileName()), file);
-        return fileRepository.save(FileConverter.toFile(pictureUrl, user, null));
+        String fileType = this.getFileExtension(file);
+        return fileRepository.save(FileConverter.toFile(pictureUrl, fileType ,user, null));
     }
 
     @Transactional
@@ -39,7 +40,8 @@ public File changeImage(MultipartFile file, User user) {
 
     public File setCommunityImage(MultipartFile file, Community community) {
         String url = s3Manager.uploadFile(s3Manager.generateUserKeyName(createFileName()), file);
-        File file1 = FileConverter.toFile(url, null, null);
+        String fileType = this.getFileExtension(file);
+        File file1 = FileConverter.toFile(url, fileType,null, null);
         file1.setCommunity(community);
         return fileRepository.save(file1);
     }
@@ -47,4 +49,17 @@ public Uuid createFileName() {
         String uuid = UUID.randomUUID().toString();
         return uuidRepository.save(Uuid.builder().uuid(uuid).build());
     }
+    /**
+     * 파일 확장자 가져오기
+     * @author 이승우
+     * @param file MultipartFile 객체
+     * @return 파일 확장자 (예: ".jpg", ".png")
+     */
+    public String getFileExtension(MultipartFile file) {
+        String originalFilename = file.getOriginalFilename();
+        if (originalFilename != null && originalFilename.contains(".")) {
+            return originalFilename.substring(originalFilename.lastIndexOf("."));
+        }
+        return ""; // 확장자가 없는 경우 빈 문자열 반환 또는 예외 처리
+    }
 }
diff --git a/src/main/java/com/example/helloworldmvc/web/dto/CommunityResponseDTO.java b/src/main/java/com/example/helloworldmvc/web/dto/CommunityResponseDTO.java
index 11db05d..4002157 100644
--- a/src/main/java/com/example/helloworldmvc/web/dto/CommunityResponseDTO.java
+++ b/src/main/java/com/example/helloworldmvc/web/dto/CommunityResponseDTO.java
@@ -34,6 +34,8 @@ public static class PostDTO{
         LocalDateTime created_at;
         Integer commentNum;
         String imageUrl;
+        String content;
+        Long category_id;
     }
 
     @Builder
@@ -43,8 +45,9 @@ public static class PostDTO{
     public static class PostDetailDTO{
         String title;
         String content;
+        String communityWriterEmail;
         LocalDateTime created_at;
-        List<String> fileList;
+        List<FileDTO.FileDetailRes> fileList;
         List<CommentDTO> commentDTOList;
     }
 
@@ -54,6 +57,7 @@ public static class PostDetailDTO{
     @AllArgsConstructor
     public static class CommentDTO{
         Long anonymousName;
+        String commentWriterEmail;
         LocalDateTime created_at;
         String content;
     }
diff --git a/src/main/java/com/example/helloworldmvc/web/dto/FileDTO.java b/src/main/java/com/example/helloworldmvc/web/dto/FileDTO.java
index 8449eae..29a919c 100644
--- a/src/main/java/com/example/helloworldmvc/web/dto/FileDTO.java
+++ b/src/main/java/com/example/helloworldmvc/web/dto/FileDTO.java
@@ -10,4 +10,12 @@
 public class FileDTO {
     private Long imageId;
     private String imageUrl;
+    @Builder
+    @Getter
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class FileDetailRes{
+        String fileUrl;
+        String fileType;
+    }
 }
\ No newline at end of file