diff --git a/src/main/java/meltingpot/server/auth/service/MailService.java b/src/main/java/meltingpot/server/auth/service/MailService.java
index b3db63b..45dc0c9 100644
--- a/src/main/java/meltingpot/server/auth/service/MailService.java
+++ b/src/main/java/meltingpot/server/auth/service/MailService.java
@@ -3,6 +3,8 @@
 import lombok.RequiredArgsConstructor;
 import meltingpot.server.auth.controller.dto.MailVerificationRequestDto;
 import meltingpot.server.auth.controller.dto.VerificationCodeRequestDto;
+import meltingpot.server.domain.entity.Account;
+import meltingpot.server.domain.entity.UserReportCount;
 import meltingpot.server.util.Constants;
 import meltingpot.server.domain.entity.MailVerification;
 import meltingpot.server.domain.repository.AccountRepository;
@@ -118,4 +120,21 @@ public void checkUserName(String username) {
         }
     }
 
+    @Transactional
+    public ResponseCode sendReportAlertEmail(Account account, int reportCount) {
+        String title = "누적 신고 5회 이상 알림";
+        String to = "support@meltingpot.kr";
+        String templateName = "ReportAlertTemplate.html";
+
+        Map<String, String> mailValues = Map.of(
+                "username", account.getName(),
+                "userEmail",account.getUsername(),
+                "userId", account.getId().toString(),
+                "reportCount", String.valueOf(reportCount)
+        );
+
+        mailUtil.sendMimeMessageMailWithValues(title, to, templateName, mailValues);
+        return ResponseCode.MAIL_REPORT_ALRERT_SEND_SUCCESS;
+    }
+
 }
diff --git a/src/main/java/meltingpot/server/domain/entity/Account.java b/src/main/java/meltingpot/server/domain/entity/Account.java
index d33de76..1a1a141 100644
--- a/src/main/java/meltingpot/server/domain/entity/Account.java
+++ b/src/main/java/meltingpot/server/domain/entity/Account.java
@@ -85,6 +85,9 @@ public class Account extends BaseEntity {
     @OneToMany(mappedBy = "account")
     private List<AccountRole> accountRoles = new ArrayList<>();
 
+    @OneToOne(mappedBy = "account", cascade = CascadeType.ALL)
+    private UserReportCount userReportCount;
+
     public List<String> toAuthStringList() {
         return accountRoles.stream().map(a -> a.getRole().getAuthority())
                 .collect(Collectors.toList());
diff --git a/src/main/java/meltingpot/server/domain/entity/Report.java b/src/main/java/meltingpot/server/domain/entity/Report.java
index 509dd5f..ca515bd 100644
--- a/src/main/java/meltingpot/server/domain/entity/Report.java
+++ b/src/main/java/meltingpot/server/domain/entity/Report.java
@@ -2,6 +2,7 @@
 
 import jakarta.persistence.*;
 import lombok.*;
+import meltingpot.server.domain.entity.comment.Comment;
 import meltingpot.server.domain.entity.common.BaseEntity;
 import meltingpot.server.domain.entity.post.Post;
 
@@ -16,13 +17,20 @@ public class Report extends BaseEntity {
     @Column(name = "report_id")
     private Long id;
 
+    @Column(length = 1500)
     private String content;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "post_id")
     private Post post;
 
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "comment_id")
+    private Comment comment;
+
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id")
     private Account account;
+
+
 }
diff --git a/src/main/java/meltingpot/server/domain/entity/UserReportCount.java b/src/main/java/meltingpot/server/domain/entity/UserReportCount.java
new file mode 100644
index 0000000..e377b5f
--- /dev/null
+++ b/src/main/java/meltingpot/server/domain/entity/UserReportCount.java
@@ -0,0 +1,33 @@
+package meltingpot.server.domain.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+@Entity
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor(access = AccessLevel.PROTECTED)
+@Builder
+@Getter
+@Setter
+public class UserReportCount {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "user_report_count_id")
+    private Long id;
+
+    @Column(name = "report_count")
+    private int reportCount;
+
+    @OneToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "account_id")
+    private Account account;
+
+    public void incrementReportCount() {
+        this.reportCount++;
+    }
+
+    public UserReportCount(Account account, int reportCount) {
+        this.account = account;
+        this.reportCount = reportCount;
+    }
+}
diff --git a/src/main/java/meltingpot/server/domain/entity/comment/Comment.java b/src/main/java/meltingpot/server/domain/entity/comment/Comment.java
index 529edfe..d6a5379 100644
--- a/src/main/java/meltingpot/server/domain/entity/comment/Comment.java
+++ b/src/main/java/meltingpot/server/domain/entity/comment/Comment.java
@@ -21,12 +21,15 @@ public class Comment extends BaseEntity {
     @Column(name = "comment_id")
     private Long id;
 
-    @Size(min = 10, max = 500)
+    @Column(length = 1500)
     private String content;
 
     @Column(name = "is_anonymous")
     private boolean isAnonymous = false;
 
+    @Column(name = "report_count")
+    private int reportCount;
+
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "post_id")
     private Post post;
@@ -104,4 +107,8 @@ public void setParent(Comment parent) {
     public void setChildren(List<Comment> children) {
         this.children = children;
     }
+
+    public void incrementReportCount() {
+        this.reportCount++;
+    }
 }
diff --git a/src/main/java/meltingpot/server/domain/entity/post/Post.java b/src/main/java/meltingpot/server/domain/entity/post/Post.java
index fde69e0..f6a9bce 100644
--- a/src/main/java/meltingpot/server/domain/entity/post/Post.java
+++ b/src/main/java/meltingpot/server/domain/entity/post/Post.java
@@ -29,10 +29,12 @@ public class Post extends BaseEntity {
     @Column(name = "post_id")
     private Long id;
 
-    @Size(min = 10, max = 500)
+    @Column(length = 500)
+    @Size(max = 500, message = "제목은 한글 기준 500자 이내로 입력해주세요.")
     private String title;
 
-    @Size(min = 10, max = 500)
+    @Column(length = 500)
+    @Size(max = 500, message = "내용은 한글 기준 500자 이내로 입력해주세요.")
     private String content;
 
     @Enumerated(EnumType.STRING)
@@ -40,6 +42,9 @@ public class Post extends BaseEntity {
 
     private Boolean isDraft;
 
+    @Column(name = "report_count")
+    private int reportCount;
+
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id")
     private Account account;
@@ -69,4 +74,8 @@ public void setPostImages(List<PostImage> postImages) {
     public void setIsDraft(boolean isDraft) {
         this.isDraft = isDraft;
     }
+
+    public void incrementReportCount() {
+        this.reportCount++;
+    }
 }
diff --git a/src/main/java/meltingpot/server/domain/repository/UserReportCountRepository.java b/src/main/java/meltingpot/server/domain/repository/UserReportCountRepository.java
new file mode 100644
index 0000000..402100d
--- /dev/null
+++ b/src/main/java/meltingpot/server/domain/repository/UserReportCountRepository.java
@@ -0,0 +1,7 @@
+package meltingpot.server.domain.repository;
+
+import meltingpot.server.domain.entity.UserReportCount;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserReportCountRepository extends JpaRepository<UserReportCount, Long> {
+}
diff --git a/src/main/java/meltingpot/server/post/dto/PostDetailResponse.java b/src/main/java/meltingpot/server/post/dto/PostDetailResponse.java
index cde2713..f152c6a 100644
--- a/src/main/java/meltingpot/server/post/dto/PostDetailResponse.java
+++ b/src/main/java/meltingpot/server/post/dto/PostDetailResponse.java
@@ -1,6 +1,7 @@
 package meltingpot.server.post.dto;
 
 import lombok.*;
+import meltingpot.server.domain.entity.enums.PostType;
 import meltingpot.server.domain.entity.post.Post;
 import java.time.LocalDateTime;
 import java.util.List;
@@ -13,14 +14,14 @@
 public class PostDetailResponse {
     private Long postId;
     private Long userId;
+    private PostType postType;
     private String name;
     private String title;
     private String content;
-    private List<ImageData> imgData;  // Image data including ID and URL
+    private List<ImageData> imgData;
     private Integer commentCount;
     private LocalDateTime updatedAt;
 
-    // Static nested class to hold image data
     @Getter
     @AllArgsConstructor
     @NoArgsConstructor
@@ -41,6 +42,7 @@ public static PostDetailResponse of(Post post) {
         return PostDetailResponse.builder()
                 .postId(post.getId())
                 .userId(post.getAccount().getId())
+                .postType(post.getPostType())
                 .name(post.getAccount().getName())
                 .title(post.getTitle())
                 .content(post.getContent())
diff --git a/src/main/java/meltingpot/server/report/controller/ReportController.java b/src/main/java/meltingpot/server/report/controller/ReportController.java
index 102f4d0..1a82547 100644
--- a/src/main/java/meltingpot/server/report/controller/ReportController.java
+++ b/src/main/java/meltingpot/server/report/controller/ReportController.java
@@ -3,7 +3,7 @@
 import io.swagger.v3.oas.annotations.Operation;
 import lombok.RequiredArgsConstructor;
 import meltingpot.server.domain.entity.Account;
-import meltingpot.server.report.dto.ReportRequestDTO;
+import meltingpot.server.report.dto.ReportRequest;
 import meltingpot.server.report.service.ReportService;
 import meltingpot.server.util.*;
 import org.springframework.http.ResponseEntity;
@@ -17,11 +17,22 @@
 public class ReportController {
     private final ReportService reportService;
 
-    @Operation(summary = "신고 작성")
+    @Operation(summary = "게시글 신고 작성")
     @PostMapping("/{postId}")
-    public ResponseEntity<ResponseData> createPost(@CurrentUser Account account, @RequestBody ReportRequestDTO.CreateReportDTO createReportDTO, @PathVariable Long postId) {
+    public ResponseEntity<ResponseData> createPostReport (@CurrentUser Account account, @RequestBody ReportRequest  reportRequest, @PathVariable Long postId) {
         try{
-            reportService.createReport(createReportDTO, account, postId);
+            reportService.createReport(reportRequest, account, postId,null);
+            return ResponseData.toResponseEntity (ResponseCode.REPORT_CREATE_SUCCESS);
+        }catch (NoSuchElementException e) {
+            return ResponseData.toResponseEntity( ResponseCode.REPORT_CREATE_FAIL);
+        }
+    }
+
+    @Operation(summary = "댓글 신고 작성")
+    @PostMapping("/{commentId}")
+    public ResponseEntity<ResponseData> createCommentReport(@CurrentUser Account account, @RequestBody ReportRequest  reportRequest, @PathVariable Long commentId) {
+        try{
+            reportService.createReport(reportRequest, account, null ,commentId);
             return ResponseData.toResponseEntity (ResponseCode.REPORT_CREATE_SUCCESS);
         }catch (NoSuchElementException e) {
             return ResponseData.toResponseEntity( ResponseCode.REPORT_CREATE_FAIL);
diff --git a/src/main/java/meltingpot/server/report/converter/ReportConverter.java b/src/main/java/meltingpot/server/report/converter/ReportConverter.java
deleted file mode 100644
index 1fd4633..0000000
--- a/src/main/java/meltingpot/server/report/converter/ReportConverter.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package meltingpot.server.report.converter;
-
-import meltingpot.server.domain.entity.Account;
-import meltingpot.server.domain.entity.Report;
-import meltingpot.server.domain.entity.post.Post;
-import meltingpot.server.report.dto.ReportRequestDTO;
-
-public class ReportConverter {
-
-    public static Report  toReport (ReportRequestDTO.CreateReportDTO createReportDTO, Account account, Post post){
-        return Report.builder()
-                .content(createReportDTO.getContent())
-                .account(account)
-                .post(post)
-                .build();
-    }
-}
diff --git a/src/main/java/meltingpot/server/report/dto/ReportRequest.java b/src/main/java/meltingpot/server/report/dto/ReportRequest.java
new file mode 100644
index 0000000..9f4bdc8
--- /dev/null
+++ b/src/main/java/meltingpot/server/report/dto/ReportRequest.java
@@ -0,0 +1,34 @@
+package meltingpot.server.report.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import meltingpot.server.domain.entity.Account;
+import meltingpot.server.domain.entity.Report;
+import meltingpot.server.domain.entity.comment.Comment;
+import meltingpot.server.domain.entity.post.Post;
+
+@Getter
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class ReportRequest {
+    private String content;
+
+    public Report toEntity(Account account, Post post){
+        return Report.builder()
+                .content(content)
+                .post(post)
+                .account(account)
+                .build();
+    }
+
+    public Report toEntity(Account account, Comment comment){
+        return Report.builder()
+                .content(content)
+                .comment(comment)
+                .account(account)
+                .build();
+    }
+}
diff --git a/src/main/java/meltingpot/server/report/dto/ReportRequestDTO.java b/src/main/java/meltingpot/server/report/dto/ReportRequestDTO.java
deleted file mode 100644
index f36dd96..0000000
--- a/src/main/java/meltingpot/server/report/dto/ReportRequestDTO.java
+++ /dev/null
@@ -1,11 +0,0 @@
-package meltingpot.server.report.dto;
-
-import lombok.Getter;
-
-public class ReportRequestDTO {
-
-    @Getter
-    public static class CreateReportDTO {
-        private String content;
-    }
-}
diff --git a/src/main/java/meltingpot/server/report/service/ReportService.java b/src/main/java/meltingpot/server/report/service/ReportService.java
index dda0feb..b79956e 100644
--- a/src/main/java/meltingpot/server/report/service/ReportService.java
+++ b/src/main/java/meltingpot/server/report/service/ReportService.java
@@ -1,9 +1,87 @@
 package meltingpot.server.report.service;
 
+import lombok.RequiredArgsConstructor;
+import meltingpot.server.auth.service.MailService;
 import meltingpot.server.domain.entity.Account;
-import meltingpot.server.report.dto.ReportRequestDTO;
+import meltingpot.server.domain.entity.Report;
+import meltingpot.server.domain.entity.UserReportCount;
+import meltingpot.server.domain.entity.comment.Comment;
+import meltingpot.server.domain.entity.post.Post;
+import meltingpot.server.domain.repository.CommentRepository;
+import meltingpot.server.domain.repository.PostRepository;
+import meltingpot.server.domain.repository.ReportRepository;
+import meltingpot.server.domain.repository.UserReportCountRepository;
+import meltingpot.server.report.dto.ReportRequest;
+import meltingpot.server.util.ResponseCode;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class ReportService {
+    private final PostRepository postRepository;
+    private final ReportRepository reportRepository;
+    private final CommentRepository commentRepository;
+    private final UserReportCountRepository userReportCountRepository;
+    private final MailService mailService;
+
+    public ResponseCode createReport (ReportRequest reportRequest, Account account, Long postId, Long commentId){
+        if (postId != null) {
+            handlePostReport(reportRequest, postId);
+        } else if (commentId != null) {
+            handleCommentReport(reportRequest, commentId);
+        }
+        return ResponseCode.REPORT_CREATE_SUCCESS;
+    }
+
+    private void updateUserReportCount(Account account){
+        UserReportCount userReportCount = userReportCountRepository.findById(account.getId())
+                .orElse(new UserReportCount(account, 0));
+        userReportCount.incrementReportCount();
+        userReportCountRepository.save(userReportCount);
+
+        if (userReportCount.getReportCount() >= 5) {
+            mailService.sendReportAlertEmail(account,userReportCount.getReportCount());
+        }
+
+    }
+    private void handlePostReport(ReportRequest reportRequest,Long postId){
+        Post post = findPostById(postId);
+        Report report = reportRequest.toEntity(post.getAccount(),post);
+        reportRepository.save(report);
+
+        post.incrementReportCount();
+        postRepository.save(post);
+        updateUserReportCount(post.getAccount());
+
+        if(post.getReportCount()>=5){
+            mailService.sendReportAlertEmail(post.getAccount(),post.getReportCount());
+        }
+    }
+
+    private void handleCommentReport(ReportRequest reportRequest,Long commentId){
+        Comment comment = findCommentById(commentId);
+        Report report = reportRequest.toEntity(comment.getAccount(),comment);
+        reportRepository.save(report);
+
+        comment.incrementReportCount();
+        commentRepository.save(comment);
+        updateUserReportCount(comment.getAccount());
+
+        if(comment.getReportCount()>=5){
+            mailService.sendReportAlertEmail(comment.getAccount(),comment.getReportCount());
+        }
+    }
+
+    private Post findPostById(Long postId) {
+        return postRepository.findById(postId)
+                .orElseThrow(() -> new RuntimeException("게시물을 찾을 수 없습니다."));
+    }
+    private Comment findCommentById(Long commentId){
+        return commentRepository.findById(commentId)
+                .orElseThrow(()->new RuntimeException("댓글을 찾을 수 없습니다."));
+    }
 
-public interface ReportService {
 
-    void createReport (ReportRequestDTO.CreateReportDTO createReportDTO, Account account, Long postId);
 }
diff --git a/src/main/java/meltingpot/server/report/service/ReportServiceImpl.java b/src/main/java/meltingpot/server/report/service/ReportServiceImpl.java
deleted file mode 100644
index cb82240..0000000
--- a/src/main/java/meltingpot/server/report/service/ReportServiceImpl.java
+++ /dev/null
@@ -1,33 +0,0 @@
-package meltingpot.server.report.service;
-
-import lombok.RequiredArgsConstructor;
-import meltingpot.server.domain.entity.Account;
-import meltingpot.server.domain.entity.Report;
-import meltingpot.server.domain.entity.post.Post;
-import meltingpot.server.domain.repository.PostRepository;
-import meltingpot.server.domain.repository.ReportRepository;
-import meltingpot.server.report.dto.ReportRequestDTO;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-
-import static meltingpot.server.report.converter.ReportConverter.toReport;
-
-@Service
-@RequiredArgsConstructor
-@Transactional
-public class ReportServiceImpl implements ReportService {
-    private final PostRepository postRepository;
-    private final ReportRepository reportRepository;
-
-    @Override
-    public void createReport (ReportRequestDTO.CreateReportDTO createReportDTO, Account account, Long postId){
-        Post post = findPostById(postId);
-        Report report = toReport(createReportDTO,account,post);
-        reportRepository.save(report);
-    }
-
-    private Post findPostById(Long postId) {
-        return postRepository.findById(postId)
-                .orElseThrow(() -> new RuntimeException("게시물을 찾을 수 없습니다."));
-    }
-}
diff --git a/src/main/java/meltingpot/server/util/ResponseCode.java b/src/main/java/meltingpot/server/util/ResponseCode.java
index b502ae4..f15b07f 100644
--- a/src/main/java/meltingpot/server/util/ResponseCode.java
+++ b/src/main/java/meltingpot/server/util/ResponseCode.java
@@ -15,6 +15,7 @@ public enum ResponseCode {
     OAUTH_SIGNIN_SUCCESS(OK, "SNS 로그인 성공"),
     SIGNOUT_SUCCESS(OK, "로그아웃 성공"),
     REISSUE_TOKEN_SUCCESS(OK, "토큰 재발급 성공"),
+    MAIL_REPORT_ALRERT_SEND_SUCCESS(OK,"누적 신고 알림 메일 전송 성공"),
     MAIL_VERIFICATION_SEND_SUCCESS(OK, "이메일 인증번호 전송 성공"),
     MAIL_VERIFICATION_CHECK_SUCCESS(OK, "인증번호가 일치합니다"),
     MAIL_AVAILABLE(OK, "사용 가능한 이메일입니다"),
diff --git a/src/main/resources/templates/ReportAlertTemplate.html b/src/main/resources/templates/ReportAlertTemplate.html
new file mode 100644
index 0000000..d99dc2f
--- /dev/null
+++ b/src/main/resources/templates/ReportAlertTemplate.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>누적 신고 5회 이상 알림</title>
+</head>
+<body>
+<h3>누적 신고 5회 이상인 사용자 알림</h3>
+<p>사용자Id: [[${userId}]]</p>
+<p>사용자명: [[${username}]]</p>
+<p>사용자 이메일: [[${userEmail}]]</p>
+<p>신고 횟수: [[${reportCount}]]회</p>
+</body>
+</html>