diff --git a/src/main/java/konkuk/thip/record/adapter/in/web/response/RecordSearchResponse.java b/src/main/java/konkuk/thip/record/adapter/in/web/response/RecordSearchResponse.java
index ff522b443..beb99f468 100644
--- a/src/main/java/konkuk/thip/record/adapter/in/web/response/RecordSearchResponse.java
+++ b/src/main/java/konkuk/thip/record/adapter/in/web/response/RecordSearchResponse.java
@@ -8,6 +8,7 @@
 public record RecordSearchResponse(
     List<PostDto> postList,
     Long roomId,
+    String isbn,
     String nextCursor,
     Boolean isLast
 ){
diff --git a/src/main/java/konkuk/thip/record/application/service/RecordSearchService.java b/src/main/java/konkuk/thip/record/application/service/RecordSearchService.java
index be98b7706..d6a62eddc 100644
--- a/src/main/java/konkuk/thip/record/application/service/RecordSearchService.java
+++ b/src/main/java/konkuk/thip/record/application/service/RecordSearchService.java
@@ -105,6 +105,7 @@ public RecordSearchResponse search(RecordSearchQuery recordSearchQuery) {
         // RecordSearchResponse 생성
         return RecordSearchResponse.builder()
                 .roomId(roomId)
+                .isbn(book.getIsbn())
                 .postList(postDtos)
                 .nextCursor(cursorBasedList.nextCursor())
                 .isLast(!cursorBasedList.hasNext())
diff --git a/src/main/java/konkuk/thip/room/adapter/in/web/response/RoomGetDeadlinePopularResponse.java b/src/main/java/konkuk/thip/room/adapter/in/web/response/RoomGetDeadlinePopularResponse.java
index 9ad45ee16..57f547b4e 100644
--- a/src/main/java/konkuk/thip/room/adapter/in/web/response/RoomGetDeadlinePopularResponse.java
+++ b/src/main/java/konkuk/thip/room/adapter/in/web/response/RoomGetDeadlinePopularResponse.java
@@ -10,6 +10,7 @@ public record RoomDto(
             Long roomId,
             String bookImageUrl,
             String roomName,
+            int recruitCount, // 방 최대 인원 수
             int memberCount,
             String deadlineDate
     ) {
diff --git a/src/main/java/konkuk/thip/room/adapter/out/persistence/repository/RoomQueryRepositoryImpl.java b/src/main/java/konkuk/thip/room/adapter/out/persistence/repository/RoomQueryRepositoryImpl.java
index ce2274797..cfd34d32c 100644
--- a/src/main/java/konkuk/thip/room/adapter/out/persistence/repository/RoomQueryRepositoryImpl.java
+++ b/src/main/java/konkuk/thip/room/adapter/out/persistence/repository/RoomQueryRepositoryImpl.java
@@ -343,6 +343,7 @@ public List<RoomQueryDto> findRoomsByCategoryOrderByStartDateAsc(String category
                         room.roomId,
                         book.imageUrl,
                         room.title,
+                        room.recruitCount,
                         room.memberCount,
                         room.startDate
                 ))
@@ -362,6 +363,7 @@ public List<RoomQueryDto> findRoomsByCategoryOrderByMemberCount(String categoryV
                         room.roomId,
                         book.imageUrl,
                         room.title,
+                        room.recruitCount,
                         room.memberCount,
                         room.startDate
                 ))
@@ -425,6 +427,7 @@ private List<RoomQueryDto> fetchMyRooms(
                         room.roomId,
                         book.imageUrl,
                         room.title,
+                        room.recruitCount,
                         room.memberCount,
                         cursorExpr
                 ))
diff --git a/src/main/java/konkuk/thip/room/application/port/out/dto/RoomQueryDto.java b/src/main/java/konkuk/thip/room/application/port/out/dto/RoomQueryDto.java
index 15105c02c..9369b9b95 100644
--- a/src/main/java/konkuk/thip/room/application/port/out/dto/RoomQueryDto.java
+++ b/src/main/java/konkuk/thip/room/application/port/out/dto/RoomQueryDto.java
@@ -11,6 +11,7 @@ public record RoomQueryDto(
         Long roomId,
         String bookImageUrl,
         String roomName,
+        int recruitCount, // 방 최대 인원 수
         int memberCount,
         LocalDate endDate       // 방 진행 마감일 or 방 모집 마감일
 ) {
@@ -20,6 +21,7 @@ public record RoomQueryDto(
         Assert.notNull(bookImageUrl, "bookImageUrl must not be null");
         Assert.notNull(roomName, "roomName must not be null");
         Assert.notNull(endDate, "endDate must not be null");
+        Assert.isTrue(recruitCount > 0, "recruitCount must be greater than 0");
         Assert.isTrue(memberCount >= 0, "memberCount must be greater than or equal to 0");
     }
 }