diff --git a/Katheryne.Tests/Mocks/MockParamModule.cs b/Katheryne.Tests/Mocks/MockParamModule.cs
new file mode 100644
index 0000000..e824dda
--- /dev/null
+++ b/Katheryne.Tests/Mocks/MockParamModule.cs
@@ -0,0 +1,34 @@
+using Katheryne.Abstractions;
+
+namespace Katheryne.Tests.Mocks;
+
+public class MockParamModule : IParamsModule
+{
+    private readonly Dictionary<string, Func<string>> _functions = new();
+
+    public string ModuleName => "test";
+
+    public MockParamModule()
+    {
+        _functions.Add("hello", Hello);
+    }
+
+    public string this[string param]
+    {
+        get
+        {
+            Func<string> func = _functions[param];
+            return func();
+        }
+    }
+
+    public bool ContainsParam(string param)
+    {
+        return _functions.ContainsKey(param);
+    }
+
+    private string Hello()
+    {
+        return "Hello, Katheryne";
+    }
+}
\ No newline at end of file
diff --git a/Katheryne.Tests/StringFormatterTests.cs b/Katheryne.Tests/StringFormatterTests.cs
index d9d697d..9f2703c 100644
--- a/Katheryne.Tests/StringFormatterTests.cs
+++ b/Katheryne.Tests/StringFormatterTests.cs
@@ -1,14 +1,25 @@
 using System.Text.RegularExpressions;
+using Katheryne.Abstractions;
+using Katheryne.Exceptions;
 using Katheryne.Models;
+using Katheryne.Tests.Mocks;
 
 namespace Katheryne.Tests;
 
 public class StringFormatterTests
 {
+    private readonly Dictionary<string, IParamsModule> _modules = new();
+
+    public StringFormatterTests()
+    {
+        var module = new MockParamModule();
+        _modules.Add(module.ModuleName, module);
+    }
+
     [Fact]
     public void FormatTest1()
     {
-        StringFormatter formatter = new("Hello $1");
+        StringFormatter formatter = new("Hello $1", _modules);
 
         Regex regex = new("I'm (.*)");
 
@@ -23,7 +34,7 @@ public class StringFormatterTests
     [Fact]
     public void FormatTest2()
     {
-        StringFormatter formatter = new("$你好呀 $1, 欢迎你离开垃圾的$2.");
+        StringFormatter formatter = new("$你好呀 $1, 欢迎你离开垃圾的$2.", _modules);
 
         Regex regex = new("你好，我是(.*)，我来自(.*)\\.");
 
@@ -34,4 +45,21 @@ public class StringFormatterTests
         
         Assert.Equal("$你好呀 Ichirinko, 欢迎你离开垃圾的Trinity.", formatter.Format(match.Groups));
     }
+
+    [Fact]
+    public void ParamFormatTest1()
+    {
+        StringFormatter formatter = new("Test @test/hello", _modules);
+
+        Regex regex = new(".*?");
+        Match match = regex.Match("Test Input");
+
+        Assert.Equal("Test Hello, Katheryne", formatter.Format(match.Groups));
+    }
+
+    [Fact]
+    public void ParamFormatTest2()
+    {
+        Assert.Throws<GrammarException>(() => new StringFormatter("Test @test/nonexistent", _modules));
+    }
 }
\ No newline at end of file
diff --git a/Katheryne/Abstractions/IParamsModule.cs b/Katheryne/Abstractions/IParamsModule.cs
new file mode 100644
index 0000000..ddaa168
--- /dev/null
+++ b/Katheryne/Abstractions/IParamsModule.cs
@@ -0,0 +1,13 @@
+namespace Katheryne.Abstractions;
+
+/// <summary>
+/// 参数实现模块
+/// </summary>
+public interface IParamsModule
+{
+    public string ModuleName { get; }
+
+    public string this[string param] { get; }
+
+    public bool ContainsParam(string param);
+}
\ No newline at end of file
diff --git a/Katheryne/KatheryneChatRobot.cs b/Katheryne/KatheryneChatRobot.cs
index 9537f56..14b93e8 100644
--- a/Katheryne/KatheryneChatRobot.cs
+++ b/Katheryne/KatheryneChatRobot.cs
@@ -59,14 +59,16 @@ public class KatheryneChatRobot : IChatRobot
                 if (answer.IsFormat)
                 {
                     string temp = answer.Format(match.Groups);
-                    _logger.LogInformation("Format answer {} to {}.", answer.RowString, temp);
+                    _logger.LogInformation("Format answer {} to {}.",
+                        answer.RowString, temp);
                     result.Add(temp);
                 }
                 else
                 {
                     result.Add(answer.RowString);
                 }
-                _logger.LogInformation("Moving to stage {} on input {}.", _currentStage, input);
+                _logger.LogInformation("Moving to stage {} on input {}.",
+                    _currentStage, input);
                 break;
             }
         }
@@ -93,7 +95,8 @@ public class KatheryneChatRobot : IChatRobot
                     _currentStage = transformer.NextStage;
                     result.Add(_grammarTree[_currentStage].Answer.RowString);
                     
-                    _logger.LogInformation("Moving to stage {} with empty transform.", _currentStage);
+                    _logger.LogInformation("Moving to stage {} with empty transform.",
+                        _currentStage);
                     break;
                 }
             }
diff --git a/Katheryne/Models/GrammarParam.cs b/Katheryne/Models/GrammarParam.cs
new file mode 100644
index 0000000..f6e400b
--- /dev/null
+++ b/Katheryne/Models/GrammarParam.cs
@@ -0,0 +1,3 @@
+namespace Katheryne.Models;
+
+public record GrammarParam(string OriginString, string Module, string Param);
\ No newline at end of file
diff --git a/Katheryne/Models/GrammarTree.cs b/Katheryne/Models/GrammarTree.cs
index 2c4effa..070594f 100644
--- a/Katheryne/Models/GrammarTree.cs
+++ b/Katheryne/Models/GrammarTree.cs
@@ -1,3 +1,4 @@
+using Katheryne.Abstractions;
 using Katheryne.Exceptions;
 
 namespace Katheryne.Models;
@@ -6,11 +7,11 @@ public class GrammarTree
 {
     private readonly Dictionary<string, InnerStage> _stages = new();
 
-    public GrammarTree(LexicalModel model)
+    public GrammarTree(LexicalModel model, Dictionary<string, IParamsModule> modules)
     {
         foreach (Stage stage in model.Stages)
         {
-            _stages[stage.Name] = new InnerStage(stage);
+            _stages[stage.Name] = new InnerStage(stage, modules);
         }
 
         if (!Validate(model))
diff --git a/Katheryne/Models/InnerStage.cs b/Katheryne/Models/InnerStage.cs
index 4eacdd8..2235256 100644
--- a/Katheryne/Models/InnerStage.cs
+++ b/Katheryne/Models/InnerStage.cs
@@ -1,3 +1,5 @@
+using Katheryne.Abstractions;
+
 namespace Katheryne.Models;
 
 internal class InnerStage
@@ -8,10 +10,10 @@ internal class InnerStage
         
     public StringFormatter Answer { get; }
 
-    public InnerStage(Stage stage)
+    public InnerStage(Stage stage, Dictionary<string, IParamsModule> modules)
     {
         Name = stage.Name;
-        Answer = new StringFormatter(stage.Answer);
+        Answer = new StringFormatter(stage.Answer, modules);
 
         foreach (Transformer transformer in stage.Transformers)
         {
diff --git a/Katheryne/Models/StringFormatter.cs b/Katheryne/Models/StringFormatter.cs
index 76b7da9..9b37481 100644
--- a/Katheryne/Models/StringFormatter.cs
+++ b/Katheryne/Models/StringFormatter.cs
@@ -1,4 +1,6 @@
 using System.Text.RegularExpressions;
+using Katheryne.Abstractions;
+using Katheryne.Exceptions;
 
 namespace Katheryne.Models;
 
@@ -7,12 +9,20 @@ namespace Katheryne.Models;
 /// </summary>
 public class StringFormatter
 {
-    private readonly string _originString;
-    private readonly List<FormatTag> _formatTags = new();
+    private static readonly HashSet<char> s_delimiters = new()
+    {
+        ',', '.', '!', ';', '?', ' ', '，', '。', '；'
+    };
 
-    public StringFormatter(string originString)
+    private readonly string _originString;
+    private readonly Dictionary<string, IParamsModule> _modules;
+    private readonly List<FormatTag> _formatTags = new();
+    private readonly List<GrammarParam> _params = new();
+
+    public StringFormatter(string originString, Dictionary<string, IParamsModule> modules)
     {
         _originString = originString;
+        _modules = modules;
         
         GetFormatTags();
     }
@@ -35,22 +45,33 @@ public class StringFormatter
             result = result.Replace(tag.Value, collection[tag.Index].Value);
         }
 
+        foreach (GrammarParam param in _params)
+        {
+            result = result.Replace(param.OriginString,
+                _modules[param.Module][param.Param]);
+        }
+
         return result;
     }
 
     private void GetFormatTags()
     {
-        List<int> indexes = new();
+        List<int> tagIndices = new();
+        List<int> paramIndices = new();
 
         for (var i = 0; i < _originString.Length; i++)
         {
             if (_originString[i] == '$')
             {
-                indexes.Add(i);
+                tagIndices.Add(i);
+            }
+            else if (_originString[i] == '@')
+            {
+                paramIndices.Add(i);
             }
         }
 
-        foreach (int index in indexes)
+        foreach (int index in tagIndices)
         {
             string value = string.Empty;
             int pos = index + 1;
@@ -74,5 +95,43 @@ public class StringFormatter
             
             _formatTags.Add(new FormatTag('$' + value, int.Parse(value)));
         }
+
+        List<char> chars = new();
+        foreach (int index in paramIndices)
+        {
+            chars.Clear();
+            int i = index + 1;
+
+            while (i < _originString.Length && !s_delimiters.Contains(_originString[i]))
+            {
+                chars.Add(_originString[i]);
+                i++;
+            }
+
+            string text = new(chars.ToArray());
+
+            string[] array = text.Split('/');
+
+            if (array.Length != 2)
+            {
+                throw new GrammarException($"Failed to parse grammar param: {text}.");
+            }
+
+            if (!_modules.ContainsKey(array[0]))
+            {
+                throw new GrammarException($"Unknown module {array[0]}.");
+            }
+
+            if (!_modules[array[0]].ContainsParam(array[1]))
+            {
+                throw new GrammarException($"Module {array[0]} doesn't support {array[1]}.");
+            }
+
+            _params.Add(new GrammarParam(
+                '@' + text,
+                array[0],
+                array[1]
+            ));
+        }
     }
 }
\ No newline at end of file
diff --git a/Katheryne/Services/KatheryneChatRobotFactory.cs b/Katheryne/Services/KatheryneChatRobotFactory.cs
index 43af940..1b4bff4 100644
--- a/Katheryne/Services/KatheryneChatRobotFactory.cs
+++ b/Katheryne/Services/KatheryneChatRobotFactory.cs
@@ -13,6 +13,8 @@ public class KatheryneChatRobotFactory : IChatRobotFactory
     private readonly ILogger<KatheryneChatRobot> _robotLogger;
     private readonly DefaultChatRobot _defaultChatRobot;
 
+    private readonly Dictionary<string, IParamsModule> _modules = new();
+
     private Grammar? _grammar;
 
     public string GrammarText { get; private set; } = string.Empty;
@@ -48,7 +50,8 @@ public class KatheryneChatRobotFactory : IChatRobotFactory
         {
             throw new GrammarException("Failed to parse lexical model.", ex);
         }
-        _grammar = new Grammar(new GrammarTree(model), model.RobotName, model.BeginStageName);
+        _grammar = new Grammar(new GrammarTree(model, _modules),
+            model.RobotName, model.BeginStageName);
     }
 
     public IChatRobot GetRobot()