diff --git a/src/main/kotlin/JChatGPT.kt b/src/main/kotlin/JChatGPT.kt
index e9989f1..736fff1 100644
--- a/src/main/kotlin/JChatGPT.kt
+++ b/src/main/kotlin/JChatGPT.kt
@@ -548,7 +548,10 @@ object JChatGPT : KotlinPlugin(
         SendCompositeMessage(),
 
         // 记忆代理
-        MemoryAgent(),
+        MemoryAppend(),
+
+        // 记忆修改
+        MemoryReplace(),
 
         // 结束循环
         StopLoopAgent(),
diff --git a/src/main/kotlin/PluginData.kt b/src/main/kotlin/PluginData.kt
index e03e249..66781ec 100644
--- a/src/main/kotlin/PluginData.kt
+++ b/src/main/kotlin/PluginData.kt
@@ -8,4 +8,28 @@ object PluginData : AutoSavePluginData("data") {
      * 联系人记忆
      */
     val contactMemory by value(mutableMapOf<Long, String>())
+
+    /**
+     * 添加对话记忆
+     */
+    fun appendContactMemory(contactId: Long, newMemory: String) {
+        val memory = contactMemory[contactId]
+        if (memory.isNullOrEmpty()) {
+            contactMemory[contactId] = "* $newMemory"
+        } else {
+            contactMemory[contactId] = "$memory\n* $newMemory"
+        }
+    }
+
+    /**
+     * 替换对话记忆
+     */
+    fun replaceContactMemory(contactId: Long, oldMemory: String, newMemory: String) {
+        val memory = contactMemory[contactId]
+        if (memory.isNullOrEmpty()) {
+            contactMemory[contactId] = "* $newMemory"
+        } else {
+            contactMemory[contactId] = memory.replace(oldMemory, newMemory)
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/tools/MemoryAgent.kt b/src/main/kotlin/tools/MemoryAppend.kt
similarity index 72%
rename from src/main/kotlin/tools/MemoryAgent.kt
rename to src/main/kotlin/tools/MemoryAppend.kt
index 868b9ee..533d957 100644
--- a/src/main/kotlin/tools/MemoryAgent.kt
+++ b/src/main/kotlin/tools/MemoryAppend.kt
@@ -12,16 +12,16 @@ import net.mamoe.mirai.event.events.MessageEvent
 import top.jie65535.mirai.JChatGPT
 import top.jie65535.mirai.PluginData
 
-class MemoryAgent : BaseAgent(
+class MemoryAppend : BaseAgent(
     tool = Tool.function(
-        name = "remember",
-        description = "用于更新当前记忆块，可以用于记住网友的特征和事实等。新增记忆时请带上原记忆，否则会被覆盖！",
+        name = "memoryAppend",
+        description = "新增记忆项",
         parameters = Parameters.buildJsonObject {
             put("type", "object")
             putJsonObject("properties") {
                 putJsonObject("memory") {
                     put("type", "string")
-                    put("description", "新记忆内容，无序列表文本块。")
+                    put("description", "记忆项")
                 }
             }
             putJsonArray("required") {
@@ -34,9 +34,8 @@ class MemoryAgent : BaseAgent(
         requireNotNull(args)
         val contactId = event.subject.id
         val memoryText = args.getValue("memory").jsonPrimitive.content
-        JChatGPT.logger.info("Remember ($contactId): $memoryText")
-        PluginData.contactMemory[contactId] = memoryText
-
+        JChatGPT.logger.info("Remember ($contactId): \"$memoryText\"")
+        PluginData.appendContactMemory(contactId, memoryText)
         return "OK"
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/tools/MemoryReplace.kt b/src/main/kotlin/tools/MemoryReplace.kt
new file mode 100644
index 0000000..f6fe2e7
--- /dev/null
+++ b/src/main/kotlin/tools/MemoryReplace.kt
@@ -0,0 +1,47 @@
+package top.jie65535.mirai.tools
+
+import com.aallam.openai.api.chat.Tool
+import com.aallam.openai.api.core.Parameters
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.add
+import kotlinx.serialization.json.jsonPrimitive
+import kotlinx.serialization.json.put
+import kotlinx.serialization.json.putJsonArray
+import kotlinx.serialization.json.putJsonObject
+import net.mamoe.mirai.event.events.MessageEvent
+import top.jie65535.mirai.JChatGPT
+import top.jie65535.mirai.PluginData
+
+class MemoryReplace : BaseAgent(
+    tool = Tool.Companion.function(
+        name = "memoryReplace",
+        description = "替换记忆项",
+        parameters = Parameters.Companion.buildJsonObject {
+            put("type", "object")
+            putJsonObject("properties") {
+                putJsonObject("oldMemory") {
+                    put("type", "string")
+                    put("description", "原记忆项")
+                }
+                putJsonObject("newMemory") {
+                    put("type", "string")
+                    put("description", "新记忆项")
+                }
+            }
+            putJsonArray("required") {
+                add("oldMemory")
+                add("newMemory")
+            }
+        }
+    )
+) {
+    override suspend fun execute(args: JsonObject?, event: MessageEvent): String {
+        requireNotNull(args)
+        val contactId = event.subject.id
+        val oldMemoryText = args.getValue("oldMemory").jsonPrimitive.content
+        val newMemoryText = args.getValue("newMemory").jsonPrimitive.content
+        JChatGPT.logger.info("Replace memory ($contactId): \"$oldMemoryText\" -> \"$newMemoryText\"")
+        PluginData.replaceContactMemory(contactId, oldMemoryText, newMemoryText)
+        return "OK"
+    }
+}
\ No newline at end of file