diff --git a/agents-flex-core/src/main/java/com/agentsflex/core/document/id/DocumentIdGeneratorFactory.java b/agents-flex-core/src/main/java/com/agentsflex/core/document/id/DocumentIdGeneratorFactory.java
new file mode 100644
index 0000000..d2e5c35
--- /dev/null
+++ b/agents-flex-core/src/main/java/com/agentsflex/core/document/id/DocumentIdGeneratorFactory.java
@@ -0,0 +1,47 @@
+/*
+ *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.agentsflex.core.document.id;
+
+public abstract class DocumentIdGeneratorFactory {
+
+    private static DocumentIdGeneratorFactory factory = new DocumentIdGeneratorFactory() {
+        final MD5IdGenerator randomIdGenerator = new MD5IdGenerator();
+
+        @Override
+        public DocumentIdGenerator createGenerator() {
+            return randomIdGenerator;
+        }
+    };
+
+    public static DocumentIdGeneratorFactory getFactory() {
+        return factory;
+    }
+
+    public static void setFactory(DocumentIdGeneratorFactory factory) {
+        if (factory == null) {
+            throw new NullPointerException("factory can not be null");
+        }
+        DocumentIdGeneratorFactory.factory = factory;
+    }
+
+    public static DocumentIdGenerator getDocumentIdGenerator() {
+        return factory.createGenerator();
+    }
+
+
+    abstract DocumentIdGenerator createGenerator();
+
+}