diff --git a/src/main/java/com/umc/StudyFlexBE/controller/StudyController.java b/src/main/java/com/umc/StudyFlexBE/controller/StudyController.java
index 5b0e2a9..b93b912 100644
--- a/src/main/java/com/umc/StudyFlexBE/controller/StudyController.java
+++ b/src/main/java/com/umc/StudyFlexBE/controller/StudyController.java
@@ -3,7 +3,6 @@
 import com.umc.StudyFlexBE.dto.request.StudyNoticeReq;
 import com.umc.StudyFlexBE.dto.request.StudyReq;
 import com.umc.StudyFlexBE.dto.response.*;
-import com.umc.StudyFlexBE.entity.Study;
 import com.umc.StudyFlexBE.service.StudyService;
 import jakarta.validation.Valid;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -69,19 +68,19 @@ public BaseResponse<?> participation(@PathVariable Long study_id){
         }
     }
     @GetMapping("/latest")
-    public ResponseEntity<List<Study>> getLatestStudies() {
-        List<Study> latestStudies = studyService.getLatestStudies();
+    public ResponseEntity<List<StudyMainPageResponseDto>> getLatestStudies() {
+        List<StudyMainPageResponseDto> latestStudies = studyService.getLatestStudies();
         return ResponseEntity.ok(latestStudies);
     }
 
     @GetMapping("/open")
-    public ResponseEntity<List<Study>> getOpenStudies() {
-        List<Study> openStudies = studyService.getOpenStudies();
+    public ResponseEntity<List<StudyMainPageResponseDto>> getOpenStudies() {
+        List<StudyMainPageResponseDto> openStudies = studyService.getOpenStudies();
         return ResponseEntity.ok(openStudies);
     }
     @GetMapping("/ranking")
-    public ResponseEntity<List<Study>> getStudyRanking() {
-        List<Study> rankedStudies = studyService.getRankedStudies();
+    public ResponseEntity<List<StudyMainPageResponseDto>> getStudyRanking() {
+        List<StudyMainPageResponseDto> rankedStudies = studyService.getRankedStudies();
         return ResponseEntity.ok(rankedStudies);
     }
 
diff --git a/src/main/java/com/umc/StudyFlexBE/dto/response/StudyMainPageResponseDto.java b/src/main/java/com/umc/StudyFlexBE/dto/response/StudyMainPageResponseDto.java
new file mode 100644
index 0000000..a1aedd0
--- /dev/null
+++ b/src/main/java/com/umc/StudyFlexBE/dto/response/StudyMainPageResponseDto.java
@@ -0,0 +1,28 @@
+package com.umc.StudyFlexBE.dto.response;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+/*
+"studyId": 1,
+            "studyName": "파이썬 마스터",
+            "thumbnailUrl": "https://example.com/images/study-python-thumbnail.jpg",
+            "studyStatus": "모집중",
+            "maxMembers": 5,
+            "currentMembers": 3,
+ */
+@Getter
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class StudyMainPageResponseDto {
+    private int studyId;
+    private String studyName;
+    private String thumbnailUrl;
+    private String studyStatus;
+    private int maxMembers;
+    private int currentMembers;
+
+}
diff --git a/src/main/java/com/umc/StudyFlexBE/entity/Category.java b/src/main/java/com/umc/StudyFlexBE/entity/Category.java
index 4cd447c..6999386 100644
--- a/src/main/java/com/umc/StudyFlexBE/entity/Category.java
+++ b/src/main/java/com/umc/StudyFlexBE/entity/Category.java
@@ -1,5 +1,6 @@
 package com.umc.StudyFlexBE.entity;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import jakarta.persistence.*;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
@@ -21,6 +22,8 @@ public class Category {
     private String name;
 
     @OneToOne(mappedBy = "category")
+    @JsonIgnore
+
     private Study study;
 
 }
diff --git a/src/main/java/com/umc/StudyFlexBE/repository/StudyRepository.java b/src/main/java/com/umc/StudyFlexBE/repository/StudyRepository.java
index 3b04a6e..1259e8a 100644
--- a/src/main/java/com/umc/StudyFlexBE/repository/StudyRepository.java
+++ b/src/main/java/com/umc/StudyFlexBE/repository/StudyRepository.java
@@ -2,6 +2,7 @@
 
 import com.umc.StudyFlexBE.entity.Category;
 import com.umc.StudyFlexBE.entity.Study;
+import com.umc.StudyFlexBE.entity.StudyStatus;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
@@ -18,7 +19,7 @@ public interface StudyRepository extends JpaRepository<Study, Long> {
 
     List<Study> findTop5ByOrderByCreatedAtDesc();
 
-    List<Study> findByStatus(String status);
+    List<Study> findByStatus(StudyStatus studyStatus);
 
     boolean existsByName(String name);
 
diff --git a/src/main/java/com/umc/StudyFlexBE/service/StudyService.java b/src/main/java/com/umc/StudyFlexBE/service/StudyService.java
index 1e3883a..8689bf3 100644
--- a/src/main/java/com/umc/StudyFlexBE/service/StudyService.java
+++ b/src/main/java/com/umc/StudyFlexBE/service/StudyService.java
@@ -51,11 +51,34 @@ public StudyService(
         this.awsS3Service = awsS3Service;
     }
 
-    public List<Study> getLatestStudies() {
-        return studyRepository.findTop5ByOrderByCreatedAtDesc();
+    public List<StudyMainPageResponseDto> getLatestStudies() {
+        List<Study> latestStudies = studyRepository.findTop5ByOrderByCreatedAtDesc();
+
+        return latestStudies.stream()
+                .map(study -> StudyMainPageResponseDto.builder()
+                        .studyId(study.getId().intValue())
+                        .studyName(study.getName())
+                        .thumbnailUrl(study.getThumbnailUrl())
+                        .studyStatus(study.getStatus().toString())
+                        .maxMembers(study.getMaxMembers())
+                        .currentMembers(study.getCurrentMembers())
+                        .build())
+                .collect(Collectors.toList());
     }
-    public List<Study> getOpenStudies() {
-        return studyRepository.findByStatus("모집중"); // 또는 StudyStatus.모집중, enum 사용시
+
+    public List<StudyMainPageResponseDto> getOpenStudies() {
+        List<Study> openedStudies = studyRepository.findByStatus(StudyStatus.valueOf("RECRUITING"));
+
+        return openedStudies.stream()
+                .map(study -> StudyMainPageResponseDto.builder()
+                        .studyId(study.getId().intValue())
+                        .studyName(study.getName())
+                        .thumbnailUrl(study.getThumbnailUrl())
+                        .studyStatus(study.getStatus().toString())
+                        .maxMembers(study.getMaxMembers())
+                        .currentMembers(study.getCurrentMembers())
+                        .build())
+                .collect(Collectors.toList());
     }
 
     public void checkDuplicateStudyName(String name){
@@ -175,12 +198,20 @@ public StudyRes createStudy(StudyReq studyReq, String email){
     }
 
 
-    public List<Study> getRankedStudies() {
+    public List<StudyMainPageResponseDto> getRankedStudies() {
         List<Study> studies = studyRepository.findAll();
         studies.forEach(this::calculateRankScore);
         return studies.stream()
                 .sorted((s1, s2) -> Double.compare(s2.getRankScore(), s1.getRankScore()))
                 .limit(3)
+                .map(study -> StudyMainPageResponseDto.builder()
+                        .studyId(study.getId().intValue()) // Long을 int로 변환 (필요에 따라 조정)
+                        .studyName(study.getName())
+                        .thumbnailUrl(study.getThumbnailUrl())
+                        .studyStatus(study.getStatus().toString())
+                        .maxMembers(study.getMaxMembers())
+                        .currentMembers(study.getCurrentMembers())
+                        .build())
                 .collect(Collectors.toList());
     }