diff --git a/src/main/java/com/kusitms/samsion/domain/album/infrastructure/AlbumRepositoryImpl.java b/src/main/java/com/kusitms/samsion/domain/album/infrastructure/AlbumRepositoryImpl.java
index 38be7ba..8825cac 100644
--- a/src/main/java/com/kusitms/samsion/domain/album/infrastructure/AlbumRepositoryImpl.java
+++ b/src/main/java/com/kusitms/samsion/domain/album/infrastructure/AlbumRepositoryImpl.java
@@ -3,9 +3,6 @@
 import com.kusitms.samsion.common.querydsl.OrderByNull;
 import com.kusitms.samsion.domain.album.domain.entity.*;
 import com.kusitms.samsion.domain.album.domain.repository.AlbumRepositoryCustom;
-import com.kusitms.samsion.domain.comment.domain.entity.QComment;
-import com.querydsl.core.types.Expression;
-import com.querydsl.core.types.Order;
 import com.querydsl.core.types.OrderSpecifier;
 import com.querydsl.core.types.dsl.BooleanExpression;
 import com.querydsl.jpa.JPAExpressions;
@@ -85,17 +82,10 @@ private OrderSpecifier<?> getSortedColumn(SortType sortType) {
             case EMPATHY:
                 return QAlbum.album.empathies.size().desc();
             case COMMENT:
-				return new OrderSpecifier<>(Order.DESC, getCommentSubQuery());
+                return QAlbum.album.comments.size().desc();
         }
         return OrderByNull.getDefault();
     }
 
-    private Expression getCommentSubQuery() {
-        return JPAExpressions.select(QComment.comment.id.count())
-                .from(QComment.comment)
-                .where(QComment.comment.deleted.isFalse(),
-                        QComment.comment.album.id.eq(QAlbum.album.id));
-    }
-
 
 }
diff --git a/src/main/java/com/kusitms/samsion/domain/comment/domain/entity/Comment.java b/src/main/java/com/kusitms/samsion/domain/comment/domain/entity/Comment.java
index 6e79c7b..3b324b2 100644
--- a/src/main/java/com/kusitms/samsion/domain/comment/domain/entity/Comment.java
+++ b/src/main/java/com/kusitms/samsion/domain/comment/domain/entity/Comment.java
@@ -7,6 +7,7 @@
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.Where;
 
 import javax.persistence.*;
 import java.util.ArrayList;
@@ -15,7 +16,8 @@
 @Getter
 @Entity
 @NoArgsConstructor(access = lombok.AccessLevel.PROTECTED)
-@SQLDelete(sql = "UPDATE comment SET deleted = true WHERE id = ?")
+@SQLDelete(sql = "UPDATE comment SET deleted = true WHERE comment_id = ?")
+@Where(clause = "deleted = false")
 public class Comment extends BaseEntity {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
@@ -40,7 +42,7 @@ public class Comment extends BaseEntity {
     private Comment parent;
 
     //자식 정의 (대댓글)
-    @OneToMany(mappedBy = "parent", cascade = CascadeType.ALL)
+    @OneToMany(mappedBy = "parent", cascade = CascadeType.ALL, orphanRemoval = true)
     private List<Comment> childList = new ArrayList<>();
 
     public void addChild(Comment child){
diff --git a/src/main/java/com/kusitms/samsion/domain/comment/presentation/CommentController.java b/src/main/java/com/kusitms/samsion/domain/comment/presentation/CommentController.java
index 72ac0b9..8abbfb4 100644
--- a/src/main/java/com/kusitms/samsion/domain/comment/presentation/CommentController.java
+++ b/src/main/java/com/kusitms/samsion/domain/comment/presentation/CommentController.java
@@ -43,7 +43,7 @@ public CommentInfoResponse update(@PathVariable Long commentId, @RequestBody Com
         return commentUpdateUseCase.updateComment(commentId, commentUpdateRequest);
     }
 
-    @CacheEvict(value = CachingStoreConst.COMMENT_COUNT_CACHE_NAME, key = "#albumId")
+    @CacheEvict(value = CachingStoreConst.COMMENT_COUNT_CACHE_NAME, key = "#albumId",condition="#albumId!=null")
     @DeleteMapping("/{albumId}/comment/{commentId}")
     public void delete(@PathVariable Long commentId){
         commentDeleteUseCase.deleteComment(commentId);