diff --git a/src/main/java/com/numberone/backend/domain/article/controller/ArticleController.java b/src/main/java/com/numberone/backend/domain/article/controller/ArticleController.java
index 071f59c7..d4bea002 100644
--- a/src/main/java/com/numberone/backend/domain/article/controller/ArticleController.java
+++ b/src/main/java/com/numberone/backend/domain/article/controller/ArticleController.java
@@ -87,7 +87,7 @@ public ResponseEntity<GetArticleDetailResponse> getArticleDetails(@PathVariable(
     @GetMapping
     public ResponseEntity<Slice<GetArticleListResponse>> getArticlePages(
             Pageable pageable,
-            @ModelAttribute ArticleSearchParameter param) { // todo: 해당 유저가 좋아요를 눌렀는지 여부까지 표시되도록 수정
+            @ModelAttribute ArticleSearchParameter param) {
         return ResponseEntity.ok(articleService.getArticleListPaging(param, pageable));
     }
 
diff --git a/src/main/java/com/numberone/backend/domain/article/dto/response/GetArticleDetailResponse.java b/src/main/java/com/numberone/backend/domain/article/dto/response/GetArticleDetailResponse.java
index ec940a48..a695eb61 100644
--- a/src/main/java/com/numberone/backend/domain/article/dto/response/GetArticleDetailResponse.java
+++ b/src/main/java/com/numberone/backend/domain/article/dto/response/GetArticleDetailResponse.java
@@ -26,6 +26,7 @@ public class GetArticleDetailResponse {
     private String content;
     private boolean isLiked;
     private ArticleTag articleTag;
+    private Long commentCount;
 
     // 작성자 관련
     private String ownerName;
@@ -43,7 +44,8 @@ public static GetArticleDetailResponse of(
             List<String> imageUrls,
             String thumbNailImageUrl,
             Member owner,
-            List<Long> memberLikedArticleList) {
+            List<Long> memberLikedArticleList,
+            Long commentCount ) {
         return GetArticleDetailResponse.builder()
                 .articleId(article.getId())
                 .title(article.getTitle())
@@ -64,8 +66,8 @@ public static GetArticleDetailResponse of(
                 .ownerProfileImageUrl(owner.getProfileImageUrl())
                 .isLiked(memberLikedArticleList.contains(article.getId()))
                 .articleTag(article.getArticleTag())
+                .commentCount(commentCount)
                 .build();
     }
 
-
 }
diff --git a/src/main/java/com/numberone/backend/domain/article/dto/response/GetArticleListResponse.java b/src/main/java/com/numberone/backend/domain/article/dto/response/GetArticleListResponse.java
index cfbaa595..cf86ba21 100644
--- a/src/main/java/com/numberone/backend/domain/article/dto/response/GetArticleListResponse.java
+++ b/src/main/java/com/numberone/backend/domain/article/dto/response/GetArticleListResponse.java
@@ -32,7 +32,7 @@ public class GetArticleListResponse {
     private Long thumbNailImageId;
 
     private Integer articleLikeCount;
-    private Integer commentCount;
+    private Long commentCount;
     private Boolean isLiked;
 
 
@@ -48,7 +48,6 @@ public GetArticleListResponse(Article article, Long ownerId, Long thumbNailImage
         this.articleStatus = article.getArticleStatus();
         this.thumbNailImageId = thumbNailImageId;
         this.articleLikeCount = article.getLikeCount();
-        this.commentCount = article.getCommentCount();
     }
 
     public void setOwnerNickName(String nickName){
@@ -59,7 +58,14 @@ public void setThumbNailImageUrl(String thumbNailImageUrl){
         this.thumbNailImageUrl = thumbNailImageUrl;
     }
 
-    public void updateInfo(Optional<Member> owner, Optional<ArticleImage> articleImage, List<Long> memberLikedArticleIdList){
+    public void setCommentCount(Long commentCount){
+        this.commentCount = commentCount;
+    }
+
+    public void updateInfo(Optional<Member> owner,
+                           Optional<ArticleImage> articleImage,
+                           List<Long> memberLikedArticleIdList,
+                           Long commentCount ){
         owner.ifPresentOrElse(
                 o -> setOwnerNickName(o.getNickName()),
                 () -> setOwnerNickName("알 수 없는 사용자")
@@ -69,6 +75,7 @@ public void updateInfo(Optional<Member> owner, Optional<ArticleImage> articleIma
                 () -> setThumbNailImageUrl("")
         );
         this.isLiked = memberLikedArticleIdList.contains(id);
+        this.commentCount = commentCount;
     }
 
 }
diff --git a/src/main/java/com/numberone/backend/domain/article/entity/Article.java b/src/main/java/com/numberone/backend/domain/article/entity/Article.java
index aec9aee7..92f0785f 100644
--- a/src/main/java/com/numberone/backend/domain/article/entity/Article.java
+++ b/src/main/java/com/numberone/backend/domain/article/entity/Article.java
@@ -58,10 +58,6 @@ public class Article extends BaseTimeEntity {
     @Comment("게시글 좋아요 개수")
     private Integer likeCount;
 
-    @ColumnDefault("0")
-    @Comment("게시글에 달린 댓글 개수")
-    private Integer commentCount;
-
     @Comment("작성자 ID")
     private Long articleOwnerId;
 
@@ -71,7 +67,6 @@ public Article(String title, String content, Long articleOwnerId, ArticleTag tag
         this.articleOwnerId = articleOwnerId;
         this.articleTag = tag;
         this.articleStatus = ArticleStatus.ACTIVATED;
-        this.commentCount = 0;
         this.likeCount = 0;
     }
 
diff --git a/src/main/java/com/numberone/backend/domain/article/service/ArticleService.java b/src/main/java/com/numberone/backend/domain/article/service/ArticleService.java
index 97ca9ece..52de3c0d 100644
--- a/src/main/java/com/numberone/backend/domain/article/service/ArticleService.java
+++ b/src/main/java/com/numberone/backend/domain/article/service/ArticleService.java
@@ -141,6 +141,7 @@ public GetArticleDetailResponse getArticleDetail(Long articleId) {
 
 
         Optional<ArticleImage> thumbNailImage = articleImageRepository.findById(article.getThumbNailImageUrlId());
+        Long commentCount = commentRepository.countAllByArticle(articleId);
 
         String thumbNailImageUrl = "";
         if (thumbNailImage.isPresent()) {
@@ -152,7 +153,7 @@ public GetArticleDetailResponse getArticleDetail(Long articleId) {
                 .stream().map(ArticleLike::getArticleId)
                 .toList();
 
-        return GetArticleDetailResponse.of(article, imageUrls, thumbNailImageUrl, owner, memberLikedArticleIdList);
+        return GetArticleDetailResponse.of(article, imageUrls, thumbNailImageUrl, owner, memberLikedArticleIdList, commentCount);
     }
 
     public Slice<GetArticleListResponse> getArticleListPaging(ArticleSearchParameter param, Pageable pageable) {
@@ -177,8 +178,9 @@ public void updateArticleInfo(GetArticleListResponse articleInfo, List<Long> mem
 
         Optional<Member> owner = memberRepository.findById(ownerId);
         Optional<ArticleImage> articleImage = articleImageRepository.findById(thumbNailImageUrlId);
+        Long commentCount = commentRepository.countAllByArticle(articleInfo.getId());
 
-        articleInfo.updateInfo(owner, articleImage, memberLikedArticleIdList);
+        articleInfo.updateInfo(owner, articleImage, memberLikedArticleIdList, commentCount);
     }
 
     @Transactional
@@ -193,8 +195,8 @@ public CreateCommentResponse createComment(Long articleId, CreateCommentRequest
         );
 
         articleParticipantRepository.save(new ArticleParticipant(article, member));
+        // 게시글 작성자에게 알림을 보낸다.
         fcmMessageProvider.sendFcm(member, ARTICLE_COMMENT_FCM_ALARM, NotificationTag.COMMUNITY);
-
         return CreateCommentResponse.of(savedComment);
     }
 
diff --git a/src/main/java/com/numberone/backend/domain/comment/controller/CommentController.java b/src/main/java/com/numberone/backend/domain/comment/controller/CommentController.java
index 6ccf4158..be571887 100644
--- a/src/main/java/com/numberone/backend/domain/comment/controller/CommentController.java
+++ b/src/main/java/com/numberone/backend/domain/comment/controller/CommentController.java
@@ -2,12 +2,14 @@
 
 import com.numberone.backend.domain.comment.dto.request.CreateChildCommentRequest;
 import com.numberone.backend.domain.comment.dto.response.CreateChildCommentResponse;
+import com.numberone.backend.domain.comment.dto.response.DeleteCommentResponse;
 import com.numberone.backend.domain.comment.dto.response.GetCommentDto;
 import com.numberone.backend.domain.comment.service.CommentService;
 import io.swagger.v3.oas.annotations.Operation;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.hibernate.sql.Delete;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
@@ -56,10 +58,22 @@ public ResponseEntity<CreateChildCommentResponse> createChildComment(
             """)
     @GetMapping("{article-id}")
     public ResponseEntity<List<GetCommentDto>> getCommentsByArticle(@PathVariable("article-id") Long articleId){
-        List<GetCommentDto> response = commentService.getCommentsByArticle(articleId); // todo: 해당 유저가 좋아요를 눌렀는지 여부까지 표시되도록 수정
+        List<GetCommentDto> response = commentService.getCommentsByArticle(articleId);
         return ResponseEntity.ok(response);
     }
 
-    // todo: 댓글 삭제, 가장 많은 좋아요 상단 고정, 대댓글 달리면 푸시 알람 전송, 상단 고정된 작성자에게 푸시알람 전송, 댓글 신고 기능
+    @Operation(summary = "댓글 삭제 API 입니다", description = """
+            삭제할 댓글의 id 를 path variable 으로 보내주세요.
+            
+            대댓글이 존재하는 댓글을 삭제 요청하는 경우에는, 대댓글까지 모두 삭제됩니다.
+            
+            대댓글이 없는 댓글을 삭제 요청하는 경우에는 해당 댓글만 삭제됩니다.
+            """)
+    @DeleteMapping("{comment-id}")
+    public ResponseEntity<DeleteCommentResponse> deleteComment(@PathVariable("comment-id") Long commentId){
+        return ResponseEntity.ok(commentService.deleteComment(commentId));
+    }
+
+    // todo: 가장 많은 좋아요 상단 고정, 대댓글 달리면 푸시 알람 전송, 상단 고정된 작성자에게 푸시알람 전송, 댓글 신고 기능
 
 }
diff --git a/src/main/java/com/numberone/backend/domain/comment/dto/response/DeleteCommentResponse.java b/src/main/java/com/numberone/backend/domain/comment/dto/response/DeleteCommentResponse.java
new file mode 100644
index 00000000..7c06b632
--- /dev/null
+++ b/src/main/java/com/numberone/backend/domain/comment/dto/response/DeleteCommentResponse.java
@@ -0,0 +1,12 @@
+package com.numberone.backend.domain.comment.dto.response;
+
+import lombok.*;
+
+@ToString
+@Builder
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor
+public class DeleteCommentResponse {
+    private Long commentId;
+}
diff --git a/src/main/java/com/numberone/backend/domain/comment/dto/response/GetCommentDto.java b/src/main/java/com/numberone/backend/domain/comment/dto/response/GetCommentDto.java
index 4fe99af3..efedf0c3 100644
--- a/src/main/java/com/numberone/backend/domain/comment/dto/response/GetCommentDto.java
+++ b/src/main/java/com/numberone/backend/domain/comment/dto/response/GetCommentDto.java
@@ -32,6 +32,7 @@ public class GetCommentDto {
     private Long authorId;
     private String authorNickName;
     private String authorProfileImageUrl;
+    private boolean isLiked;
 
 
     @QueryProjection
@@ -47,7 +48,7 @@ public GetCommentDto(CommentEntity comment){
         this.likeCount = comment.getLikeCount();
     }
 
-    public void updateCommentInfo(Optional<Member> author){
+    public void updateCommentInfo(Optional<Member> author, List<Long> likedCommentIdList){
         author.ifPresentOrElse(
                 a -> {
                     this.authorNickName = a.getNickName();
@@ -57,6 +58,7 @@ public void updateCommentInfo(Optional<Member> author){
                     this.authorNickName = "알 수 없는 사용자";
                 }
         );
+        this.isLiked = likedCommentIdList.contains(commentId);
     }
 
 }
diff --git a/src/main/java/com/numberone/backend/domain/comment/repository/custom/CommentRepositoryCustom.java b/src/main/java/com/numberone/backend/domain/comment/repository/custom/CommentRepositoryCustom.java
index fe326c39..66adfcbf 100644
--- a/src/main/java/com/numberone/backend/domain/comment/repository/custom/CommentRepositoryCustom.java
+++ b/src/main/java/com/numberone/backend/domain/comment/repository/custom/CommentRepositoryCustom.java
@@ -5,6 +5,7 @@
 import java.util.List;
 
 public interface CommentRepositoryCustom {
-    public List<GetCommentDto> findAllByArticle(Long articleId);
+    List<GetCommentDto> findAllByArticle(Long articleId);
+    Long countAllByArticle(Long articleId);
 
 }
diff --git a/src/main/java/com/numberone/backend/domain/comment/repository/custom/CommentRepositoryCustomImpl.java b/src/main/java/com/numberone/backend/domain/comment/repository/custom/CommentRepositoryCustomImpl.java
index 69331895..ce15479f 100644
--- a/src/main/java/com/numberone/backend/domain/comment/repository/custom/CommentRepositoryCustomImpl.java
+++ b/src/main/java/com/numberone/backend/domain/comment/repository/custom/CommentRepositoryCustomImpl.java
@@ -31,4 +31,15 @@ public List<GetCommentDto> findAllByArticle(Long articleId) {
                 )
                 .fetch();
     }
+
+
+    @Override
+    public Long countAllByArticle(Long articleId) {
+        return queryFactory.select(commentEntity.count())
+                .from(commentEntity)
+                .innerJoin(article, article)
+                .where(article.id.eq(articleId))
+                .fetchOne();
+
+    }
 }
diff --git a/src/main/java/com/numberone/backend/domain/comment/service/CommentService.java b/src/main/java/com/numberone/backend/domain/comment/service/CommentService.java
index ed8b83d7..825ab152 100644
--- a/src/main/java/com/numberone/backend/domain/comment/service/CommentService.java
+++ b/src/main/java/com/numberone/backend/domain/comment/service/CommentService.java
@@ -6,9 +6,12 @@
 import com.numberone.backend.domain.articleparticipant.repository.ArticleParticipantRepository;
 import com.numberone.backend.domain.comment.dto.request.CreateChildCommentRequest;
 import com.numberone.backend.domain.comment.dto.response.CreateChildCommentResponse;
+import com.numberone.backend.domain.comment.dto.response.DeleteCommentResponse;
 import com.numberone.backend.domain.comment.dto.response.GetCommentDto;
 import com.numberone.backend.domain.comment.entity.CommentEntity;
 import com.numberone.backend.domain.comment.repository.CommentRepository;
+import com.numberone.backend.domain.like.entity.CommentLike;
+import com.numberone.backend.domain.like.repository.CommentLikeRepository;
 import com.numberone.backend.domain.member.entity.Member;
 import com.numberone.backend.domain.member.repository.MemberRepository;
 import com.numberone.backend.domain.token.util.SecurityContextProvider;
@@ -32,6 +35,7 @@ public class CommentService {
     private final ArticleRepository articleRepository;
     private final ArticleParticipantRepository articleParticipantRepository;
     private final MemberRepository memberRepository;
+    private final CommentLikeRepository commentLikeRepository;
 
     @Transactional
     public CreateChildCommentResponse createChildComment(
@@ -56,10 +60,15 @@ public CreateChildCommentResponse createChildComment(
     }
 
     public List<GetCommentDto> getCommentsByArticle(Long articleId) {
+        String principal = SecurityContextProvider.getAuthenticatedUserEmail();
+        Member member = memberRepository.findByEmail(principal)
+                .orElseThrow(NotFoundMemberException::new);
         Article article = articleRepository.findById(articleId)
                 .orElseThrow(NotFoundArticleException::new);
         List<GetCommentDto> comments = commentRepository.findAllByArticle(article.getId());
-
+        List<Long> likedCommentIdList = commentLikeRepository.findByMember(member)
+                .stream().map(CommentLike::getCommentId)
+                .toList();
         // 계층 구조로 변환 (추후 리팩토링 필요)
         List<GetCommentDto> result = new ArrayList<>();
         Map<Long, GetCommentDto> map = new HashMap<>();
@@ -68,7 +77,7 @@ public List<GetCommentDto> getCommentsByArticle(Long articleId) {
                     CommentEntity commentEntity = commentRepository.findById(comment.getCommentId())
                             .orElseThrow(NotFoundCommentException::new);
                     Optional<Member> author = memberRepository.findById(commentEntity.getAuthorId());
-                    comment.updateCommentInfo(author);
+                    comment.updateCommentInfo(author, likedCommentIdList);
 
                     map.put(comment.getCommentId(), comment);
 
@@ -85,4 +94,14 @@ public List<GetCommentDto> getCommentsByArticle(Long articleId) {
         return result;
     }
 
+    @Transactional
+    public DeleteCommentResponse deleteComment(Long commentId){
+        CommentEntity commentEntity = commentRepository.findById(commentId)
+                .orElseThrow(NotFoundCommentException::new);
+        commentRepository.delete(commentEntity);
+        return DeleteCommentResponse.builder()
+                .commentId(commentId)
+                .build();
+    }
+
 }
diff --git a/src/main/java/com/numberone/backend/domain/like/service/LikeService.java b/src/main/java/com/numberone/backend/domain/like/service/LikeService.java
index c43c90d7..f215355e 100644
--- a/src/main/java/com/numberone/backend/domain/like/service/LikeService.java
+++ b/src/main/java/com/numberone/backend/domain/like/service/LikeService.java
@@ -10,19 +10,24 @@
 import com.numberone.backend.domain.like.repository.CommentLikeRepository;
 import com.numberone.backend.domain.member.entity.Member;
 import com.numberone.backend.domain.member.repository.MemberRepository;
+import com.numberone.backend.domain.notification.entity.NotificationTag;
 import com.numberone.backend.domain.token.util.SecurityContextProvider;
 import com.numberone.backend.exception.conflict.AlreadyLikedException;
 import com.numberone.backend.exception.conflict.AlreadyUnLikedException;
 import com.numberone.backend.exception.notfound.NotFoundApiException;
 import com.numberone.backend.exception.notfound.NotFoundCommentException;
 import com.numberone.backend.exception.notfound.NotFoundMemberException;
+import com.numberone.backend.support.fcm.service.FcmMessageProvider;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.hibernate.id.IntegralDataTypeHolder;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
 
+import static com.numberone.backend.support.notification.NotificationMessage.BEST_ARTICLE_FCM_ALARM;
+
 @Slf4j
 @Service
 @RequiredArgsConstructor
@@ -34,7 +39,9 @@ public class LikeService {
     private final CommentLikeRepository commentLikeRepository;
     private final CommentRepository commentRepository;
     private final MemberRepository memberRepository;
+    private final FcmMessageProvider fcmMessageProvider;
 
+    private final Integer BEST_ARTICLE_LIKE_COUNT = 20;
 
     @Transactional
     public Integer increaseArticleLike(Long articleId) {
@@ -50,6 +57,13 @@ public Integer increaseArticleLike(Long articleId) {
         article.increaseLikeCount();
         articleLikeRepository.save(new ArticleLike(member, article));
 
+        if (article.getLikeCount() >= BEST_ARTICLE_LIKE_COUNT) {
+            Long ownerId = article.getArticleOwnerId();
+            Member owner = memberRepository.findById(ownerId)
+                    .orElseThrow(NotFoundMemberException::new);
+            fcmMessageProvider.sendFcm(owner, BEST_ARTICLE_FCM_ALARM, NotificationTag.COMMUNITY);
+        }
+
         return article.getLikeCount();
     }
 
@@ -97,7 +111,7 @@ public Integer decreaseCommentLike(Long commentId) {
                 .orElseThrow(NotFoundMemberException::new);
         CommentEntity commentEntity = commentRepository.findById(commentId)
                 .orElseThrow(NotFoundCommentException::new);
-        if (!isAlreadyLikedComment(member, commentId)){
+        if (!isAlreadyLikedComment(member, commentId)) {
             // 좋아요를 누르지 않은 댓글이라 좋아요를 취소할 수 없습니다.
             throw new AlreadyUnLikedException();
         }
diff --git a/src/main/java/com/numberone/backend/support/notification/NotificationMessage.java b/src/main/java/com/numberone/backend/support/notification/NotificationMessage.java
index 8fdf8316..aa0a387c 100644
--- a/src/main/java/com/numberone/backend/support/notification/NotificationMessage.java
+++ b/src/main/java/com/numberone/backend/support/notification/NotificationMessage.java
@@ -7,7 +7,9 @@
 @RequiredArgsConstructor
 public enum NotificationMessage implements NotificationMessageSpec {
 
-    ARTICLE_COMMENT_FCM_ALARM("[대피로 알림]", "게시글에 댓글이 달렸어요!", null);
+    ARTICLE_COMMENT_FCM_ALARM("[대피로 알림]", "게시글에 댓글이 달렸어요!", null),
+    BEST_ARTICLE_FCM_ALARM("[대피로 알림]", "축하드립니다! 베스트 게시글로 선정되었습니다. 🎉", null);
+    ;
 
     private final String title;
     private final String body;