diff --git a/lib/src/ckb_rpc/ckb_api_client.dart b/lib/src/ckb_rpc/ckb_api_client.dart
index 69b0042..5fa5397 100644
--- a/lib/src/ckb_rpc/ckb_api_client.dart
+++ b/lib/src/ckb_rpc/ckb_api_client.dart
@@ -74,6 +74,16 @@ class CKBApiClient {
     return result == null ? null : CellbaseOutputCapacity.fromJson(result);
   }
 
+  Future<Header> getHeader(String blockHash) async {
+    final result = await _request.requestRpc(ServiceUrl.getHeader, [blockHash]);
+    return result == null ? null : Header.fromJson(result);
+  }
+
+  Future<Header> getHeaderByNumber(String blockNumber) async {
+    final result = await _request.requestRpc(ServiceUrl.getHeaderByNumber, [blockNumber]);
+    return result == null ? null : Header.fromJson(result);
+  }
+
   //==========================Experiment RPC Methods==================================
 
   Future<String> computeTransactionHash(Transaction transaction) async {
diff --git a/lib/src/ckb_rpc/service_url.dart b/lib/src/ckb_rpc/service_url.dart
index da9cff1..55feed8 100644
--- a/lib/src/ckb_rpc/service_url.dart
+++ b/lib/src/ckb_rpc/service_url.dart
@@ -13,6 +13,8 @@ class ServiceUrl {
   static final tipHeader = "get_tip_header";
   static final transaction = "get_transaction";
   static final cellbaseOutputCapacity = "get_cellbase_output_capacity_details";
+  static final getHeader = "get_header";
+  static final getHeaderByNumber = "get_header_by_number";
 
   //Experiment
   static final computeTransactionHash = '_compute_transaction_hash';
diff --git a/lib/src/ckb_types/header.dart b/lib/src/ckb_types/header.dart
index bbe8d40..d6616f6 100644
--- a/lib/src/ckb_types/header.dart
+++ b/lib/src/ckb_types/header.dart
@@ -1,6 +1,7 @@
 part of 'package:ckb_sdk/ckb_types.dart';
 
 class Header {
+  String dao;
   String difficulty;
   String hash;
   String number;
diff --git a/test/api/chain_rpc_test.dart b/test/api/chain_rpc_test.dart
index 43e82bb..66657b0 100644
--- a/test/api/chain_rpc_test.dart
+++ b/test/api/chain_rpc_test.dart
@@ -152,6 +152,27 @@ main() {
     }
   });
 
+  test("get header", () async {
+    try {
+      Header header = await apiClient
+          .getHeader("0xac1766e14aa988b41d6ac3fe8216a1ab83f10359ca34478a8c0902069cbb0296");
+      expect(header != null, true);
+    } catch (error) {
+      print(error.toString());
+      expect(true, true);
+    }
+  });
+
+  test("get header by blockNumber", () async {
+    try {
+      Header header = await apiClient.getHeaderByNumber("1");
+      expect(header != null, true);
+    } catch (error) {
+      print(error.toString());
+      expect(true, true);
+    }
+  });
+
   group("get transaction", () {
     test("with right params", () async {
       try {