diff --git a/src/extensions/BootstrapBlazor.OpcDa/BootstrapBlazor.OpcDa.csproj b/src/extensions/BootstrapBlazor.OpcDa/BootstrapBlazor.OpcDa.csproj
index a490932d..6b2d13dc 100644
--- a/src/extensions/BootstrapBlazor.OpcDa/BootstrapBlazor.OpcDa.csproj
+++ b/src/extensions/BootstrapBlazor.OpcDa/BootstrapBlazor.OpcDa.csproj
@@ -1,13 +1,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <Version>9.0.0-beta01</Version>
+    <Version>9.0.0</Version>
     <RootNamespace>BootstrapBlazor.OpcDa</RootNamespace>
   </PropertyGroup>
 
   <PropertyGroup>
-    <PackageTags>Bootstrap Blazor WebAssembly wasm UI Components SqlSugar</PackageTags>
-    <Description>Bootstrap UI components extensions of SqlSugar</Description>
+    <PackageTags>Bootstrap Blazor WebAssembly wasm UI Components OpcDa PLC </PackageTags>
+    <Description>Bootstrap UI components extensions of OpcDaServer</Description>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
diff --git a/src/extensions/BootstrapBlazor.OpcDa/Extensions/Extensions.cs b/src/extensions/BootstrapBlazor.OpcDa/Extensions/Extensions.cs
index ccc0e604..1e29ec9a 100644
--- a/src/extensions/BootstrapBlazor.OpcDa/Extensions/Extensions.cs
+++ b/src/extensions/BootstrapBlazor.OpcDa/Extensions/Extensions.cs
@@ -2,6 +2,8 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 // Website: https://www.blazor.zone or https://argozhang.github.io/
 
+using Opc.Da;
+
 namespace BootstrapBlazor.OpcDa;
 
 /// <summary>
@@ -11,13 +13,15 @@ internal static class Extensions
 {
     public static Quality ToQuality(this Opc.Da.Quality quality)
     {
-        return quality.QualityBits == Opc.Da.qualityBits.good
+        return quality.QualityBits == qualityBits.good
             ? Quality.Good
             : Quality.Bad;
     }
 
-    public static ISubscription ToOpcSubscription(this Opc.Da.ISubscription subscription)
+    public static IOpcSubscription ToOpcSubscription(this ISubscription subscription)
     {
         return new OpcSubscription(subscription);
     }
+
+    public static ISubscription CreateSubscription(this Server server, string name, int updateRate = 1000, bool active = true) => server.CreateSubscription(new SubscriptionState { Name = name, Deadband = 0, UpdateRate = updateRate, Active = active });
 }
diff --git a/src/extensions/BootstrapBlazor.OpcDa/Extensions/ServiceCollectionExtensions.cs b/src/extensions/BootstrapBlazor.OpcDa/Extensions/ServiceCollectionExtensions.cs
index bf5db6fb..d374c569 100644
--- a/src/extensions/BootstrapBlazor.OpcDa/Extensions/ServiceCollectionExtensions.cs
+++ b/src/extensions/BootstrapBlazor.OpcDa/Extensions/ServiceCollectionExtensions.cs
@@ -8,19 +8,30 @@
 namespace Microsoft.Extensions.DependencyInjection;
 
 /// <summary>
-/// Opc Da 服务扩展类
+/// OpcDaServer 服务扩展类
 /// </summary>
 public static class ServiceCollectionExtensions
 {
     /// <summary>
-    /// 增加 Opc 操作服务
+    /// 增加 OpcDaServer 操作服务
     /// </summary>
     /// <param name="services"></param>
     /// <returns></returns>
     [SupportedOSPlatform("windows")]
-    public static IServiceCollection AddOpcServer(this IServiceCollection services)
+    public static IServiceCollection AddOpcDaServer(this IServiceCollection services)
     {
-        services.AddSingleton<IOpcServer, OpcServer>();
+        services.AddSingleton<IOpcDaServer, OpcDaServer>();
+        return services;
+    }
+
+    /// <summary>
+    /// 增加模拟 OpcDaServer 操作服务
+    /// </summary>
+    /// <param name="services"></param>
+    /// <returns></returns>
+    public static IServiceCollection AddMockOpcDaServer(this IServiceCollection services)
+    {
+        services.AddSingleton<IOpcDaServer, MockOpcDaServer>();
         return services;
     }
 }
diff --git a/src/extensions/BootstrapBlazor.OpcDa/IOpcServer.cs b/src/extensions/BootstrapBlazor.OpcDa/IOpcDaServer.cs
similarity index 87%
rename from src/extensions/BootstrapBlazor.OpcDa/IOpcServer.cs
rename to src/extensions/BootstrapBlazor.OpcDa/IOpcDaServer.cs
index 344fcbd0..26f015b0 100644
--- a/src/extensions/BootstrapBlazor.OpcDa/IOpcServer.cs
+++ b/src/extensions/BootstrapBlazor.OpcDa/IOpcDaServer.cs
@@ -5,9 +5,9 @@
 namespace BootstrapBlazor.OpcDa;
 
 /// <summary>
-/// Opc Server 接口定义
+/// OpcDaServer 接口定义
 /// </summary>
-public interface IOpcServer : IDisposable
+public interface IOpcDaServer : IDisposable
 {
     /// <summary>
     /// 获得 OPC Server 是否已连接
@@ -35,7 +35,7 @@ public interface IOpcServer : IDisposable
     /// 取消订阅方法
     /// </summary>
     /// <param name="subscription"></param>
-    void CancelSubscription(ISubscription subscription);
+    void CancelSubscription(IOpcSubscription subscription);
 
     /// <summary>
     /// 创建订阅方法
@@ -44,7 +44,7 @@ public interface IOpcServer : IDisposable
     /// <param name="updateRate">更新频率 默认 1000 毫秒</param>
     /// <param name="active">是否激活 默认 true</param>
     /// <returns></returns>
-    ISubscription CreateSubscription(string name, int updateRate = 1000, bool active = true);
+    IOpcSubscription CreateSubscription(string name, int updateRate = 1000, bool active = true);
 
     /// <summary>
     /// 读取 Item 值方法
diff --git a/src/extensions/BootstrapBlazor.OpcDa/ISubscription.cs b/src/extensions/BootstrapBlazor.OpcDa/IOpcSubscription.cs
similarity index 83%
rename from src/extensions/BootstrapBlazor.OpcDa/ISubscription.cs
rename to src/extensions/BootstrapBlazor.OpcDa/IOpcSubscription.cs
index 9ba1241e..db2c8535 100644
--- a/src/extensions/BootstrapBlazor.OpcDa/ISubscription.cs
+++ b/src/extensions/BootstrapBlazor.OpcDa/IOpcSubscription.cs
@@ -7,8 +7,13 @@ namespace BootstrapBlazor.OpcDa;
 /// <summary>
 /// 订阅接口定义
 /// </summary>
-public interface ISubscription
+public interface IOpcSubscription
 {
+    /// <summary>
+    /// 获得 订阅名称
+    /// </summary>
+    public string Name { get; }
+
     /// <summary>
     /// 获得/设置 是否保留最后一个值
     /// </summary>
@@ -19,12 +24,6 @@ public interface ISubscription
     /// </summary>
     Action<List<OpcReadItem>>? DataChanged { get; set; }
 
-    /// <summary>
-    /// 获得 <see cref="Opc.Da.ISubscription"/> 实例
-    /// </summary>
-    /// <returns></returns>
-    Opc.Da.ISubscription GetSubscription();
-
     /// <summary>
     /// 增加数据项
     /// </summary>
diff --git a/src/extensions/BootstrapBlazor.OpcDa/Mock/MockOpcDaServer.cs b/src/extensions/BootstrapBlazor.OpcDa/Mock/MockOpcDaServer.cs
new file mode 100644
index 00000000..1af8d610
--- /dev/null
+++ b/src/extensions/BootstrapBlazor.OpcDa/Mock/MockOpcDaServer.cs
@@ -0,0 +1,68 @@
+// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+// Website: https://www.blazor.zone or https://argozhang.github.io/
+
+namespace BootstrapBlazor.OpcDa;
+
+/// <summary>
+/// 模拟 OpcDa Server 实现类
+/// </summary>
+sealed class MockOpcDaServer : IOpcDaServer
+{
+    public bool IsConnected { get; set; }
+
+    public string? ServerName { get; set; }
+
+    private readonly Dictionary<string, IOpcSubscription> _subscriptions = [];
+
+    public bool Connect(string serverName)
+    {
+        ServerName = serverName;
+        IsConnected = true;
+        return true;
+    }
+
+    public void Disconnect()
+    {
+        IsConnected = false;
+        ServerName = null;
+    }
+
+    public IOpcSubscription CreateSubscription(string name, int updateRate = 1000, bool active = true)
+    {
+        if (_subscriptions.TryGetValue(name, out var subscription))
+        {
+            CancelSubscription(subscription);
+        }
+
+        subscription = new MockOpcDaSubscription(name, updateRate, active);
+        _subscriptions.Add(name, subscription);
+        return subscription;
+    }
+
+    public void CancelSubscription(IOpcSubscription subscription)
+    {
+        _subscriptions.Remove(subscription.Name);
+        if (subscription is IDisposable disposable)
+        {
+            disposable.Dispose();
+        }
+    }
+
+    public HashSet<OpcReadItem> Read(params HashSet<string> items)
+    {
+        return items.Select(i => new OpcReadItem(i, Quality.Good, DateTime.Now, Random.Shared.Next(1000, 2000)))
+                    .ToHashSet(OpcItemEqualityComparer<OpcReadItem>.Default);
+    }
+
+    public HashSet<OpcWriteItem> Write(params HashSet<OpcWriteItem> items)
+    {
+        return items.Select(i => new OpcWriteItem(i.Name, i.Value) { Result = true })
+                    .ToHashSet(OpcItemEqualityComparer<OpcWriteItem>.Default);
+    }
+
+    public void Dispose()
+    {
+
+    }
+}
diff --git a/src/extensions/BootstrapBlazor.OpcDa/Mock/MockOpcSubscription.cs b/src/extensions/BootstrapBlazor.OpcDa/Mock/MockOpcSubscription.cs
new file mode 100644
index 00000000..a2959cbc
--- /dev/null
+++ b/src/extensions/BootstrapBlazor.OpcDa/Mock/MockOpcSubscription.cs
@@ -0,0 +1,83 @@
+// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+// Website: https://www.blazor.zone or https://argozhang.github.io/
+
+namespace BootstrapBlazor.OpcDa;
+
+sealed class MockOpcDaSubscription : IOpcSubscription, IDisposable
+{
+    private readonly int _updateRate;
+    private readonly bool _active;
+    private readonly List<string> _items = [];
+    private CancellationTokenSource? _cts;
+
+    public MockOpcDaSubscription(string name, int updateRate = 1000, bool active = true)
+    {
+        Name = name;
+        _updateRate = updateRate;
+        _active = active;
+
+        _cts = new CancellationTokenSource();
+        _ = Task.Run(() => DoTask(_cts.Token));
+    }
+
+    public string Name { get; }
+
+    public bool KeepLastValue { get; set; }
+
+    public Action<List<OpcReadItem>>? DataChanged { get; set; }
+
+    public void AddItems(IEnumerable<string> items)
+    {
+        _items.AddRange(items);
+    }
+
+    private void UpdateValues()
+    {
+        if (DataChanged != null)
+        {
+            var values = _items.Select(i => new OpcReadItem(i, Quality.Good, DateTime.Now, Random.Shared.Next(1000, 2000))).ToList();
+            DataChanged.Invoke(values);
+        }
+    }
+
+    private async Task DoTask(CancellationToken token)
+    {
+        do
+        {
+            try
+            {
+                if (_active)
+                {
+                    UpdateValues();
+                }
+
+                await Task.Delay(_updateRate, token);
+            }
+            catch (OperationCanceledException)
+            {
+                // ignored
+            }
+        }
+        while (!token.IsCancellationRequested);
+    }
+
+    private void Dispose(bool disposing)
+    {
+        if (disposing)
+        {
+            if (_cts != null)
+            {
+                _cts.Cancel();
+                _cts.Dispose();
+                _cts = null;
+            }
+        }
+    }
+
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+}
diff --git a/src/extensions/BootstrapBlazor.OpcDa/OpcServer.cs b/src/extensions/BootstrapBlazor.OpcDa/OpcDaServer.cs
similarity index 78%
rename from src/extensions/BootstrapBlazor.OpcDa/OpcServer.cs
rename to src/extensions/BootstrapBlazor.OpcDa/OpcDaServer.cs
index b463ccf3..a1cc46e5 100644
--- a/src/extensions/BootstrapBlazor.OpcDa/OpcServer.cs
+++ b/src/extensions/BootstrapBlazor.OpcDa/OpcDaServer.cs
@@ -13,7 +13,7 @@ namespace BootstrapBlazor.OpcDa;
 /// OPC Server 操作类
 /// </summary>
 [SupportedOSPlatform("windows")]
-class OpcServer : IOpcServer
+sealed class OpcDaServer : IOpcDaServer
 {
     private Opc.Da.Server? _server = null;
     private readonly ConcurrentDictionary<string, HashSet<OpcReadItem>> _valuesCache = [];
@@ -28,6 +28,8 @@ class OpcServer : IOpcServer
     /// </summary>
     public bool IsConnected => _server?.IsConnected ?? false;
 
+    private readonly Dictionary<string, ISubscription> _subscriptions = [];
+
     /// <summary>
     /// 连接到 OPCServer 方法
     /// </summary>
@@ -54,12 +56,13 @@ public void Disconnect()
     {
         ServerName = string.Empty;
 
-        if (_server != null && _server.IsConnected)
+        if (_server is { IsConnected: true })
         {
             foreach (Subscription sub in _server.Subscriptions)
             {
                 _server.CancelSubscription(sub);
             }
+
             _server.Disconnect();
             _server = null;
         }
@@ -72,28 +75,33 @@ public void Disconnect()
     /// <param name="updateRate">更新频率 默认 1000 毫秒</param>
     /// <param name="active">是否激活 默认 true</param>
     /// <returns></returns>
-    public ISubscription CreateSubscription(string name, int updateRate = 1000, bool active = true)
+    public IOpcSubscription CreateSubscription(string name, int updateRate = 1000, bool active = true)
     {
         var server = GetOpcServer();
-        var subscription = server.CreateSubscription(new SubscriptionState
+        if (_subscriptions.TryGetValue(name, out var subscription))
         {
-            Name = name,
-            Deadband = 0,
-            UpdateRate = updateRate,
-            Active = active
-        });
+            // 已经存在该订阅
+            server.CancelSubscription(subscription);
+        }
+
+        subscription = server.CreateSubscription(name, updateRate, active);
+        _subscriptions.Add(name, subscription);
         return subscription.ToOpcSubscription();
     }
 
     /// <summary>
     /// 取消订阅方法
     /// </summary>
-    /// <param name="subscription">订阅接口 <see cref="ISubscription"/> 实例</param>
+    /// <param name="subscription">订阅接口 <see cref="IOpcSubscription"/> 实例</param>
     /// <returns></returns>
-    public void CancelSubscription(ISubscription subscription)
+    public void CancelSubscription(IOpcSubscription subscription)
     {
         var server = GetOpcServer();
-        server.CancelSubscription(subscription.GetSubscription());
+        var name = subscription.Name;
+        if (_subscriptions.Remove(name, out var sub))
+        {
+            server.CancelSubscription(sub);
+        }
     }
 
     /// <summary>
@@ -121,16 +129,17 @@ public HashSet<OpcWriteItem> Write(params HashSet<OpcWriteItem> items)
         return items.Select(i =>
         {
             var item = results.FirstOrDefault(v => v.ItemName == i.Name);
-            return new OpcWriteItem(i.Name, i.Value) { Result = item != null && item.ResultID == ResultID.S_OK };
+            return i with { Result = item != null && item.ResultID == ResultID.S_OK };
         }).ToHashSet(OpcItemEqualityComparer<OpcWriteItem>.Default);
     }
 
     private Opc.Da.Server GetOpcServer()
     {
-        if (_server == null)
+        if (_server is not { IsConnected: true })
         {
             throw new InvalidOperationException("OPC Server is not connected.");
         }
+
         return _server;
     }
 
@@ -138,7 +147,7 @@ private Opc.Da.Server GetOpcServer()
     /// Dispose 方法
     /// </summary>
     /// <param name="disposing"></param>
-    protected virtual void Dispose(bool disposing)
+    private void Dispose(bool disposing)
     {
         if (disposing)
         {
diff --git a/src/extensions/BootstrapBlazor.OpcDa/OpcSubscription.cs b/src/extensions/BootstrapBlazor.OpcDa/OpcSubscription.cs
index 3c7e222e..46822c9b 100644
--- a/src/extensions/BootstrapBlazor.OpcDa/OpcSubscription.cs
+++ b/src/extensions/BootstrapBlazor.OpcDa/OpcSubscription.cs
@@ -4,24 +4,25 @@
 
 namespace BootstrapBlazor.OpcDa;
 
-class OpcSubscription(Opc.Da.ISubscription subscription) : ISubscription
+sealed class OpcSubscription(Opc.Da.ISubscription subscription) : IOpcSubscription
 {
     public Action<List<OpcReadItem>>? DataChanged { get; set; }
 
     public bool KeepLastValue { get; set; }
 
+    public string Name => subscription.GetState().Name;
+
     public Opc.Da.ISubscription GetSubscription() => subscription;
 
     private readonly List<OpcReadItem> _cache = [];
 
     public void AddItems(IEnumerable<string> items)
     {
-        var subscription = GetSubscription();
         subscription.AddItems([.. items.Select(i => new Opc.Da.Item { ItemName = i })]);
 
         subscription.DataChanged += (_, _, values) =>
         {
-            var items = values.Select(i =>
+            var valueList = values.Select(i =>
             {
                 var item = new OpcReadItem()
                 {
@@ -32,16 +33,16 @@ public void AddItems(IEnumerable<string> items)
                 };
                 if (KeepLastValue)
                 {
-                    var v = _cache.Find(i => i.Name == item.Name);
+                    var v = _cache.Find(opcItem => opcItem.Name == item.Name);
                     item.LastValue = v.Value;
                 }
                 return item;
             }).ToList();
 
             _cache.Clear();
-            _cache.AddRange(items);
+            _cache.AddRange(valueList);
 
-            DataChanged?.Invoke(items);
+            DataChanged?.Invoke(valueList);
         };
     }
 }
diff --git a/test/UnitTestOpcDa/UnitTest1.cs b/test/UnitTestOpcDa/UnitTest1.cs
index 27911ec6..1e3e5580 100644
--- a/test/UnitTestOpcDa/UnitTest1.cs
+++ b/test/UnitTestOpcDa/UnitTest1.cs
@@ -15,10 +15,10 @@ public class UnitTest1
     public void Write_Ok()
     {
         var sc = new ServiceCollection();
-        sc.AddOpcServer();
+        sc.AddOpcDaServer();
 
         var sp = sc.BuildServiceProvider();
-        var server = sp.GetRequiredService<IOpcServer>();
+        var server = sp.GetRequiredService<IOpcDaServer>();
         var ret = server.Connect("opcda://localhost/Kepware.KEPServerEX.V6");
         Assert.True(ret);
         Assert.True(server.IsConnected);
@@ -46,10 +46,10 @@ public void Write_Ok()
     public async Task Subscription_Ok()
     {
         var sc = new ServiceCollection();
-        sc.AddOpcServer();
+        sc.AddOpcDaServer();
 
         var sp = sc.BuildServiceProvider();
-        var server = sp.GetRequiredService<IOpcServer>();
+        var server = sp.GetRequiredService<IOpcDaServer>();
         server.Connect("opcda://localhost/Kepware.KEPServerEX.V6");
 
         var subscription = server.CreateSubscription("Test", 100);