diff --git a/ApplicationLayer/Monopoly.ApplicationLayer.Application/MonopolyUsecases/Queries/CheckGameExistenceQuery.cs b/ApplicationLayer/Monopoly.ApplicationLayer.Application/MonopolyUsecases/Queries/CheckGameExistenceQuery.cs
index fe3da0e..3b518c6 100644
--- a/ApplicationLayer/Monopoly.ApplicationLayer.Application/MonopolyUsecases/Queries/CheckGameExistenceQuery.cs
+++ b/ApplicationLayer/Monopoly.ApplicationLayer.Application/MonopolyUsecases/Queries/CheckGameExistenceQuery.cs
@@ -10,11 +10,11 @@ public record Request(string GameId) : BaseRequest;
 
     public record Response(bool IsExist) : Common.Response;
 
-    public override Task ExecuteAsync(Request request,
+    public override async Task ExecuteAsync(Request request,
         IPresenter<Response> presenter,
         CancellationToken cancellationToken = default)
     {
-        var isExist = inquiry.CheckGameExistence(request.GameId);
-        return presenter.PresentAsync(new Response(isExist), cancellationToken);
+        var isExist = await inquiry.CheckGameExistenceAsync(request.GameId);
+        await presenter.PresentAsync(new Response(isExist), cancellationToken);
     }
 }
\ No newline at end of file
diff --git a/ApplicationLayer/Monopoly.ApplicationLayer.Application/MonopolyUsecases/Queries/Interfaces/IGameExistenceInquiry.cs b/ApplicationLayer/Monopoly.ApplicationLayer.Application/MonopolyUsecases/Queries/Interfaces/IGameExistenceInquiry.cs
index 028257d..70861b9 100644
--- a/ApplicationLayer/Monopoly.ApplicationLayer.Application/MonopolyUsecases/Queries/Interfaces/IGameExistenceInquiry.cs
+++ b/ApplicationLayer/Monopoly.ApplicationLayer.Application/MonopolyUsecases/Queries/Interfaces/IGameExistenceInquiry.cs
@@ -1,6 +1,14 @@
 namespace Monopoly.ApplicationLayer.Application.MonopolyUsecases.Queries.Interfaces;
 
+/// <summary>
+/// 用來確認遊戲是否存在的查詢介面
+/// </summary>
 public interface IGameExistenceInquiry
 {
-    bool CheckGameExistence(string gameId);
+    /// <summary>
+    /// 確認遊戲是否存在
+    /// </summary>
+    /// <param name="gameId">遊戲 Id</param>
+    /// <returns>當遊戲存在則回傳 true</returns>
+    Task<bool> CheckGameExistenceAsync(string gameId);
 }
\ No newline at end of file
diff --git a/InterfaceAdapterLayer/Monopoly.InterfaceAdapterLayer.Server/Repositories/Inquiries/GameExistenceInquiry.cs b/InterfaceAdapterLayer/Monopoly.InterfaceAdapterLayer.Server/Repositories/Inquiries/GameExistenceInquiry.cs
index 1fe0979..fc34b14 100644
--- a/InterfaceAdapterLayer/Monopoly.InterfaceAdapterLayer.Server/Repositories/Inquiries/GameExistenceInquiry.cs
+++ b/InterfaceAdapterLayer/Monopoly.InterfaceAdapterLayer.Server/Repositories/Inquiries/GameExistenceInquiry.cs
@@ -6,9 +6,9 @@ namespace Monopoly.InterfaceAdapterLayer.Server.Repositories.Inquiries;
 /// <inheritdoc />
 internal class GameExistenceInquiry(FakeInMemoryDatabase<MonopolyAggregate> database) : IGameExistenceInquiry
 {
-    public bool CheckGameExistence(string gameId)
+    public async Task<bool> CheckGameExistenceAsync(string gameId)
     {
-        var monopoly = database.FindByIdAsync(gameId);
+        var monopoly = await database.FindByIdAsync(gameId);
         return monopoly is not null;
     }
 }
\ No newline at end of file