diff --git a/README.md b/README.md
index 90929110acbd205c358946955b5ff17054c7594b..b4753fd4cf88621ed69195bb3eacaa97380be36e 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,41 @@ make install
 
 #### Instructions
 
-1.  xxxx
+libgmem currently has three external interfaces:
+1.
+gmemFreeEager: For address segments within a given range of [addr, addr + size], gmemFreeEager will release the entire page with the range aligned inward (default page size 2M).
+               A stream that is NULL represents synchronous calls, while a non-NULL represents asynchronous calls. Asynchronous calls will be registered on the corresponding device's work stream.
+               If there is no complete page within the scope, success will be returned directly.
+
+  The interface successfully returns 0, while failure returns an error code.
+
+  ```c
+  Prototype: int gmemFreeEager (unsigned long addr, size_t size, void * stream);
+  Usage: ret = gmemFreeEager (addr, size, stream);
+  ```
+
+2.
+gmemPrefetch: For address segments within a given range of [addr, addr + size], Prefetch will prefetch the entire page (covering the entire address segment) that aligns the page size outward from the range.
+              Ensure that the specified computing unit device hnid does not trigger a page fault in subsequent access to the vma.
+              A stream that is NULL represents synchronous calls, while a non-NULL represents asynchronous calls. Asynchronous calls will be registered on the corresponding device's work stream.
+              If the data is already on the specified device, gmemPrefetch will mark the data as hot data.
+
+  The interface successfully returns 0, while failure returns an error code.
+
+  ```c
+  Prototype: int gmemPrefetch (unsigned long addr, size_t size, int hnid, void * stream);
+  Usage: ret = gmemPrefetch (addr, size, hnid, stream);
+  ```
+
+3.
+gmemGetNumaId: Gets the NumaId of the current device.
+
+  The interface successfully returns the heterogeneous numaid of devices, while failure returns an error code.
+
+  ```c
+  Prototype: int gmemGetNumaId (void);
+  Usage: numaid = gmemGetNumaId();
+  ```
 
 #### Contribution
 
diff --git a/README_CN.md b/README_CN.md
index 44a74a83e5e33c2f4ce1bb7e64fcb153c9c675ad..46b2acc6fd4ed34ed6f8ffb48545f1e61ea67d28 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -19,7 +19,41 @@ make install
 
 #### 使用说明
 
-1.  xxxx
+libgmem当前有三个对外接口：
+1.
+gmemFreeEager：对于给定范围[addr, addr + size]的地址段，gmemFreeEager会对范围向内对齐页面大小的完整页面进行释放（默认页面大小2M）。
+               stream为空表示同步调用，非空表示异步调用，异步调用时会注册在对应设备的工作流上。
+               如果范围内不存在完整页面，将直接返回成功。
+
+  接口成功返回0，失败返回错误码。
+
+  ```c
+  接口原型: int gmemFreeEager(unsigned long addr, size_t size, void *stream);
+  接口用法: ret = gmemFreeEager(addr, size, stream);
+  ```
+
+2.
+gmemPrefetch：对于给定范围[addr, addr + size]的地址段，Prefetch会对范围向外对齐页面大小的完整页面（覆盖整个地址段）进行预取。
+              确保指定的计算单元设备hnid在接下来对vma发起的访问不会触发page fault。
+              stream为空表示同步调用，非空表示异步调用，异步调用时会注册在对应设备的工作流上。
+              如果数据已经在指定设备上，gmemPrefetch会标记数据为热数据。
+
+  接口成功返回0，失败返回错误码。
+
+  ```c
+  接口原型: int gmemPrefetch(unsigned long addr, size_t size, int hnid, void *stream);
+  接口用法: ret = gmemPrefetch(addr, size, hnid, stream);
+  ```
+
+3.
+gmemGetNumaId：获取当前设备的NumaId。
+
+  接口成功返回设备的异构NumaId，失败返回错误码。
+
+  ```c
+  接口原型: int gmemGetNumaId(void);
+  接口用法: numaid = gmemGetNumaId();
+  ```
 
 #### 参与贡献