diff --git a/src/main/java/com/devcard/devcard/auth/repository/MemberRepository.java b/src/main/java/com/devcard/devcard/auth/repository/MemberRepository.java
index b4c269e..87d0d10 100644
--- a/src/main/java/com/devcard/devcard/auth/repository/MemberRepository.java
+++ b/src/main/java/com/devcard/devcard/auth/repository/MemberRepository.java
@@ -1,8 +1,12 @@
 package com.devcard.devcard.auth.repository;
 
 import com.devcard.devcard.auth.entity.Member;
+import java.util.List;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface MemberRepository extends JpaRepository<Member, Long> {
+
     Member findByGithubId(String githubId);
+
+    List<Member> findByIdIn(List<Long> ids);
 }
diff --git a/src/main/java/com/devcard/devcard/card/controller/page/HomeController.java b/src/main/java/com/devcard/devcard/card/controller/page/HomeController.java
index 9137f12..d711013 100644
--- a/src/main/java/com/devcard/devcard/card/controller/page/HomeController.java
+++ b/src/main/java/com/devcard/devcard/card/controller/page/HomeController.java
@@ -2,6 +2,9 @@
 
 import com.devcard.devcard.auth.entity.Member;
 import com.devcard.devcard.auth.model.OauthMemberDetails;
+import com.devcard.devcard.card.dto.CardResponseDto;
+import com.devcard.devcard.card.service.CardService;
+import java.util.List;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
@@ -11,11 +14,29 @@
 @Controller
 public class HomeController {
 
+    private final CardService cardService;
+
+    public HomeController(CardService cardService) {
+        this.cardService = cardService;
+    }
+
     @GetMapping("/home")
     public String home(@AuthenticationPrincipal OauthMemberDetails oauthMemberDetails, Model model) {
         if (oauthMemberDetails != null) {
             Member member = oauthMemberDetails.getMember();
             model.addAttribute("member", member);
+
+            // CardResponseDto 리스트 가져오기
+            List<CardResponseDto> cards = cardService.getMyCards(member.getId());
+
+            // 첫 번째 카드 ID 가져오기 (카드가 존재하는 경우)
+            if (!cards.isEmpty()) {
+                Long firstCardId = cards.getFirst().getId();
+                model.addAttribute("cardId", firstCardId);
+            } else {
+                // 기본 카드 ID 또는 처리 방법 정의 (카드가 없을 경우)
+                model.addAttribute("cardId", 1); // 기본값으로 1 설정
+            }
         }
         return "home";
     }
diff --git a/src/main/java/com/devcard/devcard/card/service/GroupService.java b/src/main/java/com/devcard/devcard/card/service/GroupService.java
index 1054034..fd4340b 100644
--- a/src/main/java/com/devcard/devcard/card/service/GroupService.java
+++ b/src/main/java/com/devcard/devcard/card/service/GroupService.java
@@ -8,9 +8,12 @@
 import com.devcard.devcard.card.repository.GroupRepository;
 import com.devcard.devcard.chat.dto.CreateRoomRequest;
 import com.devcard.devcard.chat.service.ChatRoomService;
+import com.devcard.devcard.chat.service.ChatService;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -19,6 +22,8 @@
 @Service
 public class GroupService {
 
+    private static final Logger logger = LoggerFactory.getLogger(ChatService.class);
+
     private final GroupRepository groupRepository;
     private final CardRepository cardRepository;
     private final ChatRoomService chatRoomService;
@@ -62,6 +67,8 @@ public void addCardToGroup(Long groupId, Long cardId, Member member) {
         }
 
         // 채팅방 생성
+        logger.debug(
+            "Chat room participants: Member ID = " + member.getId() + ", Card Owner ID = " + card.getMember().getId());
         CreateRoomRequest createRoomRequest = new CreateRoomRequest(Arrays.asList(
             member.getId(),
             card.getMember().getId()
diff --git a/src/main/java/com/devcard/devcard/chat/model/ChatRoom.java b/src/main/java/com/devcard/devcard/chat/model/ChatRoom.java
index 8a6faec..44a371a 100644
--- a/src/main/java/com/devcard/devcard/chat/model/ChatRoom.java
+++ b/src/main/java/com/devcard/devcard/chat/model/ChatRoom.java
@@ -2,9 +2,11 @@
 
 import com.devcard.devcard.auth.entity.Member;
 import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
 import jakarta.persistence.JoinTable;
 import jakarta.persistence.ManyToMany;
 import jakarta.persistence.Table;
@@ -18,8 +20,12 @@ public class ChatRoom {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
-    @ManyToMany
-    @JoinTable(name = "chat_room_participants")
+    @ManyToMany(fetch = FetchType.EAGER)
+    @JoinTable(
+        name = "chat_room_participants",
+        joinColumns = @JoinColumn(name = "chat_room_id"),
+        inverseJoinColumns = @JoinColumn(name = "member_id")
+    )
     private List<Member> participants;
     private LocalDateTime createdAt;
     private String lastMessage = "메세지를 보내보세요.";  // 기본값 설정
diff --git a/src/main/java/com/devcard/devcard/chat/repository/ChatUserRepository.java b/src/main/java/com/devcard/devcard/chat/repository/ChatUserRepository.java
deleted file mode 100644
index 49aea8a..0000000
--- a/src/main/java/com/devcard/devcard/chat/repository/ChatUserRepository.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package com.devcard.devcard.chat.repository;
-
-import com.devcard.devcard.auth.entity.Member;
-import java.util.List;
-import org.springframework.data.jpa.repository.JpaRepository;
-
-public interface ChatUserRepository extends JpaRepository<Member, Long> {
-
-    List<Member> findByIdIn(List<Long> participantsId);
-}
diff --git a/src/main/java/com/devcard/devcard/chat/service/ChatRoomService.java b/src/main/java/com/devcard/devcard/chat/service/ChatRoomService.java
index ea58167..4788677 100644
--- a/src/main/java/com/devcard/devcard/chat/service/ChatRoomService.java
+++ b/src/main/java/com/devcard/devcard/chat/service/ChatRoomService.java
@@ -4,6 +4,7 @@
 import static com.devcard.devcard.chat.util.Constants.CHAT_ROOM_NOT_FOUND_BY_PARTICIPANTS;
 
 import com.devcard.devcard.auth.entity.Member;
+import com.devcard.devcard.auth.repository.MemberRepository;
 import com.devcard.devcard.chat.dto.ChatMessageResponse;
 import com.devcard.devcard.chat.dto.ChatRoomListResponse;
 import com.devcard.devcard.chat.dto.ChatRoomResponse;
@@ -14,9 +15,7 @@
 import com.devcard.devcard.chat.model.ChatRoom;
 import com.devcard.devcard.chat.repository.ChatRepository;
 import com.devcard.devcard.chat.repository.ChatRoomRepository;
-import com.devcard.devcard.chat.repository.ChatUserRepository;
 import java.time.LocalDateTime;
-import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 import org.springframework.stereotype.Service;
@@ -32,16 +31,16 @@ public class ChatRoomService {
 
     private final ChatRoomRepository chatRoomRepository;
     private final ChatRepository chatRepository;
-    private final ChatUserRepository chatUserRepository;
+    private final MemberRepository memberRepository;
 
     public ChatRoomService(
         ChatRoomRepository chatRoomRepository,
         ChatRepository chatRepository,
-        ChatUserRepository chatUserRepository
+        MemberRepository memberRepository
     ) {
         this.chatRoomRepository = chatRoomRepository;
         this.chatRepository = chatRepository;
-        this.chatUserRepository = chatUserRepository;
+        this.memberRepository = memberRepository;
     }
 
     /**
@@ -51,8 +50,9 @@ public ChatRoomService(
      */
     public CreateRoomResponse createChatRoom(CreateRoomRequest createRoomRequest) {
         // jpa를 이용해 ChatUser 리스트 가져오기
-        List<Member> participants = chatUserRepository.findByIdIn(createRoomRequest.getParticipantsId());
+        List<Member> participants = memberRepository.findByIdIn(createRoomRequest.getParticipantsId());
         ChatRoom chatRoom = new ChatRoom(participants, LocalDateTime.now()); // chatRoom생성
+        chatRoom.getParticipants().addAll(participants);
         chatRoomRepository.save(chatRoom); // db에 저장
         return makeCreateChatRoomResponse(chatRoom); // Response로 변환
     }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 5c4ee58..44ccb7a 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -38,3 +38,5 @@ qr.code.directory=src/main/resources/static/qrcodes/
 # Kakao Service
 # application-secret.properties? ????? ??
 spring.config.import=optional:classpath:application-secret.properties
+
+logging.level.com.devcard.devcard=DEBUG
diff --git a/src/main/resources/static/css/card/card-manage.css b/src/main/resources/static/css/card/card-manage.css
index 0f68789..abb8486 100644
--- a/src/main/resources/static/css/card/card-manage.css
+++ b/src/main/resources/static/css/card/card-manage.css
@@ -41,6 +41,7 @@
 
 /* 명함 리스트 섹션 */
 .card-list-section {
+    height: 100%;
     overflow-y: auto;
     padding: 1rem;
     display: grid;
diff --git a/src/main/resources/templates/card-list.html b/src/main/resources/templates/card-list.html
index 8644d5b..912c7eb 100644
--- a/src/main/resources/templates/card-list.html
+++ b/src/main/resources/templates/card-list.html
@@ -34,7 +34,7 @@ <h3 th:text="${card.name}">Card Name</h3>
                     <p th:text="${card.bio}">Bio</p>
                 </div>
                 <div class="card-image">
-                    <img th:src="@{${card.profilePicture}}" alt="Profile Picture">
+                    <img th:src="@{${card.profileImg}}" alt="Profile Picture">
                 </div>
             </a>
             <button class="delete-button" th:attr="card-id=${card.id}" onclick="deleteCardFromGroup(this)">삭제</button>
diff --git a/src/main/resources/templates/home.html b/src/main/resources/templates/home.html
index 291ade7..65f86b8 100644
--- a/src/main/resources/templates/home.html
+++ b/src/main/resources/templates/home.html
@@ -16,7 +16,7 @@
 <div class="card-title-container">
     <h2 class="title">My Business Card</h2>
     <!-- 명함 Card-->
-    <div th:replace="card :: cardSection(${card?.id ?: 1})"></div>
+    <div th:replace="card :: cardSection(${cardId})"></div>
 </div>
 
 <!-- 하단 네비게이션 바 -->