diff --git a/gotcha-socket/src/main/java/socket_server/domain/game/service/GameStartService.java b/gotcha-socket/src/main/java/socket_server/domain/game/service/GameStartService.java
index cc0f0183..99bd48cf 100644
--- a/gotcha-socket/src/main/java/socket_server/domain/game/service/GameStartService.java
+++ b/gotcha-socket/src/main/java/socket_server/domain/game/service/GameStartService.java
@@ -2,6 +2,7 @@
 
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.scheduling.TaskScheduler;
 import org.springframework.stereotype.Service;
 import socket_server.common.exception.ErrorType;
@@ -34,7 +35,7 @@
 @Service
 @RequiredArgsConstructor
 public class GameStartService {
-
+    @Qualifier("taskScheduler")
     private final TaskScheduler taskScheduler;
     private final RoomUserService roomUserService;
     private final GamePlayerRepository gamePlayerRepository;
@@ -91,6 +92,16 @@ public void startGame(String roomId, String userUuid, ErrorType errorType)  {
 
         // 8. 5초 후 게임 시작(EntryPoint)
         taskScheduler.schedule(() -> roundStartService.startNextRound(roomId), Instant.now().plusSeconds(5));
+
+        List<RoomUserInfo> users = new ArrayList<>(roomUserRepository.findUsersByRoomId(roomId, errorType));
+        String ownerUuid = roomMetadata.getOwnerUuid();
+
+        for (RoomUserInfo user : users) {
+            if (!user.getUserUuid().equals(ownerUuid)) {
+                user.setReady(false);
+                roomUserRepository.saveUserToRoom(user, roomId, errorType);
+            }
+        }
     }
 
     private void saveGame(Game game) {
diff --git a/gotcha-socket/src/main/java/socket_server/domain/room/service/RoomService.java b/gotcha-socket/src/main/java/socket_server/domain/room/service/RoomService.java
index 8755ce6a..417a64ea 100644
--- a/gotcha-socket/src/main/java/socket_server/domain/room/service/RoomService.java
+++ b/gotcha-socket/src/main/java/socket_server/domain/room/service/RoomService.java
@@ -171,7 +171,8 @@ private void broadcastUpdatedRoomInfoToListAndRoom(String roomId, RoomMetadata m
         RoomSummaryRes summary = RoomSummaryRes.of(metadata, currentUser);
         lobbyBroadCaster.broadcastToRoomList("SYSTEM", RoomEventType.UPDATE, summary);
 
-        List<RoomUserInfo> userList = roomUserRepository.findUsersByRoomId(roomId, ROOM_ERROR);
+        List<RoomUserInfo> userList = new ArrayList<>(roomUserRepository.findUsersByRoomId(roomId, ROOM_ERROR));
+        sortUserListWithOwnerFirst(userList, metadata.getOwnerUuid());
         RoomDetailRes roomDetailRes = new RoomDetailRes(RoomInfoRes.from(metadata), userList);
         roomBroadcaster.broadcastToRoom(roomId, "SYSTEM", RoomEventType.UPDATE, roomDetailRes);
 
@@ -224,8 +225,21 @@ public RoomDetailRes getRoomDetails(String roomId, String userUuid) {
         }
 
         RoomMetadata metadata = RoomMetadata.fromRedisMap(roomId, roomData);
-        List<RoomUserInfo> userList = roomUserRepository.findUsersByRoomId(roomId, ROOM_ERROR);
+        List<RoomUserInfo> userList = new ArrayList<>(roomUserRepository.findUsersByRoomId(roomId, ROOM_ERROR));
+        sortUserListWithOwnerFirst(userList, metadata.getOwnerUuid());
 
         return new RoomDetailRes(RoomInfoRes.from(metadata), userList);
     }
+
+    private void sortUserListWithOwnerFirst(List<RoomUserInfo> userList, String ownerUuid) {
+        userList.sort((u1, u2) -> {
+            if (u1.getUserUuid().equals(ownerUuid)) {
+                return -1;
+            }
+            if (u2.getUserUuid().equals(ownerUuid)) {
+                return 1;
+            }
+            return 0;
+        });
+    }
 }
diff --git a/gotcha-socket/src/main/java/socket_server/domain/room/service/RoomUserService.java b/gotcha-socket/src/main/java/socket_server/domain/room/service/RoomUserService.java
index d9661182..32c8c57c 100644
--- a/gotcha-socket/src/main/java/socket_server/domain/room/service/RoomUserService.java
+++ b/gotcha-socket/src/main/java/socket_server/domain/room/service/RoomUserService.java
@@ -19,6 +19,7 @@
 import socket_server.domain.room.repository.RoomRepository;
 import socket_server.domain.room.repository.RoomUserRepository;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
@@ -104,6 +105,10 @@ public void passRoomOwner(String roomId, String oldOwnerId, String newOwnerId) {
             throw new SocketCustomException(ROOM_ERROR, RoomExceptionCode.NOT_ROOM_OWNER);
         }
 
+        RoomUserInfo oldOwner = roomUserRepository.findUserInfoInRoom(roomId, oldOwnerId, ROOM_ERROR);
+        oldOwner.setReady(false);
+        roomUserRepository.saveUserToRoom(oldOwner, roomId, ROOM_ERROR);
+
         RoomUserInfo newOwner = roomUserRepository.findUserInfoInRoom(roomId, newOwnerId, ROOM_ERROR);
 
         changeRoomOwner(roomId, newOwner);
@@ -147,6 +152,9 @@ private void processUserExit(String roomId, String userUuid, boolean isKicked) {
     }
 
     public void changeRoomOwner(String roomId, RoomUserInfo newOwner) {
+        newOwner.setReady(true);
+        roomUserRepository.saveUserToRoom(newOwner, roomId, ROOM_ERROR);
+
         roomRepository.updateAllFields(roomId, Map.of(
                 RoomField.OWNER_UUID.getRedisField(), newOwner.getUserUuid(),
                 RoomField.OWNER.getRedisField(), newOwner.getNickname()
@@ -154,7 +162,8 @@ public void changeRoomOwner(String roomId, RoomUserInfo newOwner) {
 
         RoomMetadata updatedMetadata = RoomMetadata.fromRedisMap(roomId, roomRepository.getRoomData(roomId));
         RoomInfoRes roomInfoRes = RoomInfoRes.from(updatedMetadata);
-        List<RoomUserInfo> userList = roomUserRepository.findUsersByRoomId(roomId, ROOM_ERROR);
+        List<RoomUserInfo> userList = new ArrayList<>(roomUserRepository.findUsersByRoomId(roomId, ROOM_ERROR));
+        sortUserListWithOwnerFirst(userList, updatedMetadata.getOwnerUuid());
         RoomDetailRes detailRes = new RoomDetailRes(roomInfoRes, userList);
         roomBroadcaster.broadcastToRoom(roomId, newOwner.getUserUuid(), RoomEventType.UPDATE, detailRes);
 
@@ -164,6 +173,18 @@ public void changeRoomOwner(String roomId, RoomUserInfo newOwner) {
         log.info("방장 권한이 {}에게 위임되었습니다. (roomId: {})", newOwner.getUserUuid(), roomId);
     }
 
+    private void sortUserListWithOwnerFirst(List<RoomUserInfo> userList, String ownerUuid) {
+        userList.sort((u1, u2) -> {
+            if (u1.getUserUuid().equals(ownerUuid)) {
+                return -1;
+            }
+            if (u2.getUserUuid().equals(ownerUuid)) {
+                return 1;
+            }
+            return 0;
+        });
+    }
+
     public RoomMetadata validateRoomOwnerAndGetRoomMetadata(String roomId, String userUuid) {
         if(!validateRoomOwner(roomId, userUuid)){
             throw new SocketCustomException(ROOM_ERROR, RoomExceptionCode.NOT_ROOM_OWNER);