diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Agent/LINGYUN/Abp/AI/Agent/AgentService.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Agent/LINGYUN/Abp/AI/Agent/AgentService.cs
index 3d4f11183..6fe8db044 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Agent/LINGYUN/Abp/AI/Agent/AgentService.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Agent/LINGYUN/Abp/AI/Agent/AgentService.cs
@@ -54,8 +54,10 @@ public class AgentService : IAgentService, IScopedDependency
         tokenUsageInfo.WithConversationId(message.ConversationId);
         tokenUsageInfo.WithMessageId(messageId);
 
+#if DEBUG
         Console.WriteLine();
-        Console.WriteLine($"消耗Token: {tokenUsageInfo}");
+        Console.WriteLine(tokenUsageInfo);
+#endif
 
         await StoreTokenUsageInfo(tokenUsageInfo);
     }
@@ -64,9 +66,9 @@ public class AgentService : IAgentService, IScopedDependency
     {
         var messages = new List<AIChatMessage>();
 
-        if (!message.ConversationId.IsNullOrWhiteSpace())
+        if (message.ConversationId.HasValue)
         {
-            var historyMessages = await _chatMessageStore.GetHistoryMessagesAsync(message.ConversationId);
+            var historyMessages = await _chatMessageStore.GetHistoryMessagesAsync(message.ConversationId.Value);
 
             foreach (var chatMessage in historyMessages)
             {
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Chats/IChatMessageStore.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Chats/IChatMessageStore.cs
index 023f79b20..886a0e953 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Chats/IChatMessageStore.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Chats/IChatMessageStore.cs
@@ -1,4 +1,5 @@
 using LINGYUN.Abp.AI.Models;
+using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 
@@ -7,5 +8,5 @@ public interface IChatMessageStore
 {
     Task<string> SaveMessageAsync(ChatMessage message);
 
-    Task<IEnumerable<ChatMessage>> GetHistoryMessagesAsync(string conversationId);
+    Task<IEnumerable<ChatMessage>> GetHistoryMessagesAsync(Guid conversationId);
 }
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Chats/InMemoryChatMessageStore.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Chats/InMemoryChatMessageStore.cs
index 293e57202..b81ccef2b 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Chats/InMemoryChatMessageStore.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Chats/InMemoryChatMessageStore.cs
@@ -14,7 +14,7 @@ public class InMemoryChatMessageStore : IChatMessageStore
 {
     private static readonly ConcurrentDictionary<string, List<ChatMessage>> _userMessageCache = new ConcurrentDictionary<string, List<ChatMessage>>();
 
-    public Task<IEnumerable<ChatMessage>> GetHistoryMessagesAsync(string conversationId)
+    public Task<IEnumerable<ChatMessage>> GetHistoryMessagesAsync(Guid conversationId)
     {
         var messages = new List<ChatMessage>();
 
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Models/ChatMessage.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Models/ChatMessage.cs
index e173d053a..46770a3f5 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Models/ChatMessage.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Models/ChatMessage.cs
@@ -8,7 +8,7 @@ public abstract class ChatMessage
 
     public string? Id { get; private set; }
 
-    public string? ConversationId { get; private set; }
+    public Guid? ConversationId { get; private set; }
 
     public string? ReplyMessage { get; private set; }
 
@@ -33,7 +33,7 @@ public abstract class ChatMessage
         return this;
     }
 
-    public virtual ChatMessage WithConversationId(string conversationId)
+    public virtual ChatMessage WithConversationId(Guid conversationId)
     {
         ConversationId = conversationId;
         return this;
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Models/TokenUsageInfo.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Models/TokenUsageInfo.cs
index 08238d79b..770454a3a 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Models/TokenUsageInfo.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AI.Core/LINGYUN/Abp/AI/Models/TokenUsageInfo.cs
@@ -1,11 +1,12 @@
-using System.Text;
+using System;
+using System.Text;
 
 namespace LINGYUN.Abp.AI.Models;
 public class TokenUsageInfo
 {
     public string Workspace { get; }
     public string? MessageId { get; private set; }
-    public string? ConversationId { get; private set; }
+    public Guid? ConversationId { get; private set; }
     public long? InputTokenCount { get; set; }
     public long? OutputTokenCount { get; set; }
     public long? TotalTokenCount { get; set; }
@@ -21,7 +22,7 @@ public class TokenUsageInfo
         return this;
     }
 
-    public virtual TokenUsageInfo WithConversationId(string? conversationId)
+    public virtual TokenUsageInfo WithConversationId(Guid? conversationId)
     {
         ConversationId = conversationId;
         return this;
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain.Shared/LINGYUN/Abp/AIManagement/Chats/ChatMessageRecordConsts.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain.Shared/LINGYUN/Abp/AIManagement/Chats/ChatMessageRecordConsts.cs
index 3af24e28f..34283daae 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain.Shared/LINGYUN/Abp/AIManagement/Chats/ChatMessageRecordConsts.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain.Shared/LINGYUN/Abp/AIManagement/Chats/ChatMessageRecordConsts.cs
@@ -1,6 +1,5 @@
 namespace LINGYUN.Abp.AIManagement.Chats;
 public static class ChatMessageRecordConsts
 {
-    public static int MaxConversationIdLength { get; set; } = 64;
     public static int MaxChatRoleLength { get; set; } = 20;
 }
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ChatMessageRecord.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ChatMessageRecord.cs
index 2b08d4c67..91bd1c0f1 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ChatMessageRecord.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ChatMessageRecord.cs
@@ -1,6 +1,5 @@
 using Microsoft.Extensions.AI;
 using System;
-using Volo.Abp;
 using Volo.Abp.Data;
 using Volo.Abp.Domain.Entities.Auditing;
 using Volo.Abp.MultiTenancy;
@@ -16,7 +15,7 @@ public abstract class ChatMessageRecord : AuditedAggregateRoot<Guid>, IMultiTena
 
     public DateTime CreatedAt { get; private set; }
 
-    public string? ConversationId { get; private set; }
+    public Guid? ConversationId { get; private set; }
 
     public string? ReplyMessage { get; private set; }
 
@@ -42,9 +41,9 @@ public abstract class ChatMessageRecord : AuditedAggregateRoot<Guid>, IMultiTena
         TenantId = tenantId;
     }
 
-    public virtual ChatMessageRecord SetConversationId(string conversationId)
+    public virtual ChatMessageRecord SetConversationId(Guid conversationId)
     {
-        ConversationId = Check.NotNullOrWhiteSpace(conversationId, nameof(conversationId), ChatMessageRecordConsts.MaxConversationIdLength);
+        ConversationId = conversationId;
         return this;
     }
 
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ChatMessageStore.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ChatMessageStore.cs
index feb7b9f80..add01791f 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ChatMessageStore.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ChatMessageStore.cs
@@ -35,7 +35,7 @@ public class ChatMessageStore : IChatMessageStore, ITransientDependency
         _messageRecordRepository = messageRecordRepository;
     }
 
-    public async virtual Task<IEnumerable<ChatMessage>> GetHistoryMessagesAsync(string conversationId)
+    public async virtual Task<IEnumerable<ChatMessage>> GetHistoryMessagesAsync(Guid conversationId)
     {
         var maxLatestHistoryMessagesToKeep = await _settingProvider.GetAsync(
             AIManagementSettingNames.ChatMessage.MaxLatestHistoryMessagesToKeep, 0);
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ITextChatMessageRecordRepository.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ITextChatMessageRecordRepository.cs
index ad641cb43..de20f6e27 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ITextChatMessageRecordRepository.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.Domain/LINGYUN/Abp/AIManagement/Chats/ITextChatMessageRecordRepository.cs
@@ -8,7 +8,7 @@ namespace LINGYUN.Abp.AIManagement.Chats;
 public interface ITextChatMessageRecordRepository : IBasicRepository<TextChatMessageRecord, Guid>
 {
     Task<IEnumerable<TextChatMessageRecord>> GetHistoryMessagesAsync(
-        string conversationId,
+        Guid conversationId,
         int maxResultCount = 0,
         CancellationToken cancellationToken = default);
 }
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.EntityFrameworkCore/LINGYUN/Abp/AIManagement/EntityFrameworkCore/AIManagementDbContextModelBuilderExtensions.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.EntityFrameworkCore/LINGYUN/Abp/AIManagement/EntityFrameworkCore/AIManagementDbContextModelBuilderExtensions.cs
index 90a2d3fc9..185fd3c86 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.EntityFrameworkCore/LINGYUN/Abp/AIManagement/EntityFrameworkCore/AIManagementDbContextModelBuilderExtensions.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.EntityFrameworkCore/LINGYUN/Abp/AIManagement/EntityFrameworkCore/AIManagementDbContextModelBuilderExtensions.cs
@@ -27,8 +27,6 @@ public static class AIManagementDbContextModelBuilderExtensions
                 .HasMaxLength(ChatMessageRecordConsts.MaxChatRoleLength)
                 .HasConversion(new ChatRoleValueConverter())
                 .IsRequired();
-            b.Property(x => x.ConversationId)
-                .HasMaxLength(ChatMessageRecordConsts.MaxConversationIdLength);
             b.Property(x => x.Content)
                 .HasMaxLength(TextChatMessageRecordConsts.MaxContentLength)
                 .IsRequired();
diff --git a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.EntityFrameworkCore/LINGYUN/Abp/AIManagement/EntityFrameworkCore/EfCoreTextChatMessageRecordRepository.cs b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.EntityFrameworkCore/LINGYUN/Abp/AIManagement/EntityFrameworkCore/EfCoreTextChatMessageRecordRepository.cs
index 3377e6304..d5d075bd4 100644
--- a/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.EntityFrameworkCore/LINGYUN/Abp/AIManagement/EntityFrameworkCore/EfCoreTextChatMessageRecordRepository.cs
+++ b/aspnet-core/modules/ai/LINGYUN.Abp.AIManagement.EntityFrameworkCore/LINGYUN/Abp/AIManagement/EntityFrameworkCore/EfCoreTextChatMessageRecordRepository.cs
@@ -18,7 +18,7 @@ public class EfCoreTextChatMessageRecordRepository : EfCoreRepository<IAIManagem
     }
 
     public async virtual Task<IEnumerable<TextChatMessageRecord>> GetHistoryMessagesAsync(
-        string conversationId,
+        Guid conversationId,
         int maxResultCount = 0, 
         CancellationToken cancellationToken = default)
     {