diff --git a/src/main/java/com/webank/wecross/stub/web3/Web3BaseStubFactory.java b/src/main/java/com/webank/wecross/stub/web3/Web3BaseStubFactory.java
index bf312af..e7e06ff 100644
--- a/src/main/java/com/webank/wecross/stub/web3/Web3BaseStubFactory.java
+++ b/src/main/java/com/webank/wecross/stub/web3/Web3BaseStubFactory.java
@@ -7,6 +7,8 @@
 import com.webank.wecross.stub.WeCrossContext;
 import com.webank.wecross.stub.web3.account.Web3AccountFactory;
 import com.webank.wecross.stub.web3.common.Web3Constant;
+import com.webank.wecross.stub.web3.custom.CommandHandlerDispatcher;
+import com.webank.wecross.stub.web3.custom.RegisterResourceHandler;
 import java.util.Map;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -19,7 +21,10 @@ public void init(WeCrossContext weCrossContext) {}
 
   @Override
   public Driver newDriver() {
-    return new Web3Driver();
+    CommandHandlerDispatcher commandHandlerDispatcher = new CommandHandlerDispatcher();
+    commandHandlerDispatcher.registerCommandHandler(
+        Web3Constant.CUSTOM_COMMAND_REGISTER, new RegisterResourceHandler());
+    return new Web3Driver(commandHandlerDispatcher);
   }
 
   @Override
diff --git a/src/main/java/com/webank/wecross/stub/web3/Web3Connection.java b/src/main/java/com/webank/wecross/stub/web3/Web3Connection.java
index 6f617ff..5b459e3 100644
--- a/src/main/java/com/webank/wecross/stub/web3/Web3Connection.java
+++ b/src/main/java/com/webank/wecross/stub/web3/Web3Connection.java
@@ -2,7 +2,6 @@
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
-import com.moandjiezana.toml.Toml;
 import com.webank.wecross.stub.Connection;
 import com.webank.wecross.stub.Request;
 import com.webank.wecross.stub.ResourceInfo;
@@ -20,19 +19,13 @@
 import java.math.BigInteger;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.ScheduledThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
+import java.util.concurrent.ConcurrentHashMap;
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.core.io.Resource;
-import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
-import org.springframework.scheduling.concurrent.CustomizableThreadFactory;
 import org.web3j.crypto.RawTransaction;
 import org.web3j.crypto.TransactionDecoder;
 import org.web3j.protocol.core.methods.response.EthBlock;
@@ -46,53 +39,18 @@ public class Web3Connection implements Connection {
   public static final String RECEIPT_SUCCESS = "0x1";
 
   private final ObjectMapper objectMapper = ObjectMapperFactory.getObjectMapper();
-  private List<ResourceInfo> resourceInfoList = new ArrayList<>();
+  private final List<ResourceInfo> resourceInfoList = new ArrayList<>();
   private ConnectionEventHandler eventHandler;
-  private final Map<String, String> properties = new HashMap<>();
+  private final Map<String, String> properties = new ConcurrentHashMap<>();
   private final ClientWrapper clientWrapper;
   private final BigInteger chainId;
   private final String stubConfigFilePath;
-  private long stubConfigFileLastModified;
 
-  public Web3Connection(ClientWrapper clientWrapper, Web3StubConfig web3StubConfig)
-      throws IOException {
+  public Web3Connection(ClientWrapper clientWrapper, String web3StubConfigPath) throws IOException {
     this.objectMapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
     this.clientWrapper = clientWrapper;
     this.chainId = clientWrapper.ethChainId();
-    this.stubConfigFilePath = web3StubConfig.getStubConfigPath();
-    // init
-    refreshStubConfig(web3StubConfig);
-
-    // refresh
-    ScheduledExecutorService executorService =
-        new ScheduledThreadPoolExecutor(1, new CustomizableThreadFactory("refreshStubConfig-"));
-    executorService.scheduleAtFixedRate(
-        () -> {
-          try {
-            PathMatchingResourcePatternResolver resolver =
-                new PathMatchingResourcePatternResolver();
-            Resource resource = resolver.getResource(stubConfigFilePath);
-            long lastModified = resource.getFile().lastModified();
-            if (Objects.equals(stubConfigFileLastModified, lastModified)) {
-              return;
-            }
-            Web3StubConfig newWeb3StubConfig =
-                new Toml().read(resource.getInputStream()).to(Web3StubConfig.class);
-            newWeb3StubConfig.setStubConfigPath(stubConfigFilePath);
-            // changed
-            refreshStubConfig(newWeb3StubConfig);
-            if (Objects.nonNull(eventHandler)) {
-              // refresh remote resource
-              eventHandler.onResourcesChange(resourceInfoList);
-            }
-            this.stubConfigFileLastModified = lastModified;
-          } catch (IOException e) {
-            logger.error("refreshStubConfig Exception:", e);
-          }
-        },
-        30000,
-        30000,
-        TimeUnit.MILLISECONDS);
+    this.stubConfigFilePath = web3StubConfigPath;
   }
 
   @Override
@@ -336,9 +294,16 @@ private void handleAsyncTransactionRequest(Request request, Callback callback) {
     }
   }
 
-  private synchronized void refreshStubConfig(Web3StubConfig web3StubConfig) {
-    this.resourceInfoList = web3StubConfig.convertToResourceInfos();
+  public synchronized void refreshStubConfig(Web3StubConfig web3StubConfig) {
+    // update local
+    if (!resourceInfoList.isEmpty()) {
+      resourceInfoList.clear();
+    }
+    resourceInfoList.addAll(web3StubConfig.convertToResourceInfos());
 
+    if (!properties.isEmpty()) {
+      properties.clear();
+    }
     addProperty(Web3Constant.WEB3_PROPERTY_CHAIN_ID, chainId.toString());
     addProperty(Web3Constant.WEB3_PROPERTY_STUB_TYPE, web3StubConfig.getCommon().getType());
     addProperty(Web3Constant.WEB3_PROPERTY_CHAIN_URL, web3StubConfig.getService().getUrl());
@@ -352,6 +317,11 @@ private synchronized void refreshStubConfig(Web3StubConfig web3StubConfig) {
         this.addAbi(name, resource.getAbi());
       }
     }
+
+    // update remote
+    if (Objects.nonNull(eventHandler)) {
+      eventHandler.onResourcesChange(resourceInfoList);
+    }
   }
 
   public boolean hasProxyDeployed() {
@@ -389,4 +359,12 @@ public ClientWrapper getClientWrapper() {
   public BigInteger getChainId() {
     return chainId;
   }
+
+  public String getStubConfigFilePath() {
+    return stubConfigFilePath;
+  }
+
+  public ConnectionEventHandler getEventHandler() {
+    return eventHandler;
+  }
 }
diff --git a/src/main/java/com/webank/wecross/stub/web3/Web3ConnectionFactory.java b/src/main/java/com/webank/wecross/stub/web3/Web3ConnectionFactory.java
index 64865fa..e22ff99 100644
--- a/src/main/java/com/webank/wecross/stub/web3/Web3ConnectionFactory.java
+++ b/src/main/java/com/webank/wecross/stub/web3/Web3ConnectionFactory.java
@@ -14,13 +14,18 @@ public class Web3ConnectionFactory {
   public static Web3Connection build(String stubConfigPath, String configName) throws Exception {
     Web3StubConfigParser web3StubConfigParser =
         new Web3StubConfigParser(stubConfigPath, configName);
+    String configPath = web3StubConfigParser.getConfigPath();
     Web3StubConfig web3StubConfig = web3StubConfigParser.loadConfig();
-    return build(web3StubConfig);
+    return build(web3StubConfig, configPath);
   }
 
-  public static Web3Connection build(Web3StubConfig web3StubConfig) throws IOException {
+  public static Web3Connection build(Web3StubConfig web3StubConfig, String configPath)
+      throws IOException {
     logger.info("web3StubConfig: {}", web3StubConfig);
     ClientWrapper clientWrapper = ClientWrapperFactory.createClientWrapperInstance(web3StubConfig);
-    return new Web3Connection(clientWrapper, web3StubConfig);
+    Web3Connection web3Connection = new Web3Connection(clientWrapper, configPath);
+    // init
+    web3Connection.refreshStubConfig(web3StubConfig);
+    return web3Connection;
   }
 }
diff --git a/src/main/java/com/webank/wecross/stub/web3/Web3Driver.java b/src/main/java/com/webank/wecross/stub/web3/Web3Driver.java
index bb396ce..362610c 100644
--- a/src/main/java/com/webank/wecross/stub/web3/Web3Driver.java
+++ b/src/main/java/com/webank/wecross/stub/web3/Web3Driver.java
@@ -21,6 +21,8 @@
 import com.webank.wecross.stub.web3.common.Web3StatusCode;
 import com.webank.wecross.stub.web3.common.Web3StubException;
 import com.webank.wecross.stub.web3.contract.BlockUtility;
+import com.webank.wecross.stub.web3.custom.CommandHandler;
+import com.webank.wecross.stub.web3.custom.CommandHandlerDispatcher;
 import com.webank.wecross.stub.web3.protocol.request.TransactionParams;
 import com.webank.wecross.stub.web3.protocol.response.TransactionPair;
 import com.webank.wecross.stub.web3.uaproof.Signer;
@@ -57,12 +59,14 @@ public class Web3Driver implements Driver {
   private final ABICodecJsonWrapper codecJsonWrapper;
   private final ABICodec abiCodec;
   private final ABIDefinitionFactory abiDefinitionFactory;
+  private final CommandHandlerDispatcher commandHandlerDispatcher;
 
-  public Web3Driver() {
+  public Web3Driver(CommandHandlerDispatcher commandHandlerDispatcher) {
     CryptoSuite cryptoSuite = new CryptoSuite(CryptoType.ECDSA_TYPE);
     this.codecJsonWrapper = new ABICodecJsonWrapper(true);
     this.abiCodec = new ABICodec(cryptoSuite, true);
     this.abiDefinitionFactory = new ABIDefinitionFactory(cryptoSuite);
+    this.commandHandlerDispatcher = commandHandlerDispatcher;
   }
 
   @Override
@@ -402,7 +406,14 @@ public void asyncCustomCommand(
       Account account,
       BlockManager blockManager,
       Connection connection,
-      CustomCommandCallback callback) {}
+      CustomCommandCallback callback) {
+    CommandHandler commandHandler = commandHandlerDispatcher.matchCommandHandler(command);
+    if (Objects.isNull(commandHandler)) {
+      callback.onResponse(new Exception("command not supported: " + command), null);
+      return;
+    }
+    commandHandler.handle(path, args, account, blockManager, connection, callback);
+  }
 
   @Override
   public byte[] accountSign(Account account, byte[] message) {
diff --git a/src/main/java/com/webank/wecross/stub/web3/common/Web3Constant.java b/src/main/java/com/webank/wecross/stub/web3/common/Web3Constant.java
index 3eed4a2..9d780d3 100644
--- a/src/main/java/com/webank/wecross/stub/web3/common/Web3Constant.java
+++ b/src/main/java/com/webank/wecross/stub/web3/common/Web3Constant.java
@@ -7,6 +7,7 @@ public interface Web3Constant {
   String STUB_TOML_NAME = "stub.toml";
   String ACCOUNT_TOML_NAME = "account.toml";
   String WEB3_STUB_TYPE = "WEB3";
+  String WEB3_CONTRACT_TYPE = "WEB3_CONTRACT";
 
   String WEB3_PROXY_NAME = StubConstant.PROXY_NAME;
   String WEB3_HUB_NAME = StubConstant.HUB_NAME;
@@ -15,4 +16,6 @@ public interface Web3Constant {
   String WEB3_PROPERTY_CHAIN_ID = "WEB3_PROPERTY_CHAIN_ID";
   String WEB3_PROPERTY_STUB_TYPE = "WEB3_PROPERTY_STUB_TYPE";
   String WEB3_PROPERTY_CHAIN_URL = "WEB3_PROPERTY_CHAIN_URL";
+
+  String CUSTOM_COMMAND_REGISTER = "register";
 }
diff --git a/src/main/java/com/webank/wecross/stub/web3/config/Web3AccountConfig.java b/src/main/java/com/webank/wecross/stub/web3/config/Web3AccountConfig.java
index 28b81e9..6a291e3 100644
--- a/src/main/java/com/webank/wecross/stub/web3/config/Web3AccountConfig.java
+++ b/src/main/java/com/webank/wecross/stub/web3/config/Web3AccountConfig.java
@@ -8,8 +8,6 @@ public class Web3AccountConfig {
 
   private Account account;
 
-  private String accountConfigPath;
-
   public static class Account {
     private String type;
     private String accountFile;
@@ -63,22 +61,8 @@ public void setAccount(Account account) {
     this.account = account;
   }
 
-  public String getAccountConfigPath() {
-    return accountConfigPath;
-  }
-
-  public void setAccountConfigPath(String accountConfigPath) {
-    this.accountConfigPath = accountConfigPath;
-  }
-
   @Override
   public String toString() {
-    return "Web3AccountConfig{"
-        + "account="
-        + account
-        + ", accountConfigPath='"
-        + accountConfigPath
-        + '\''
-        + '}';
+    return "Web3AccountConfig{" + "account=" + account + '}';
   }
 }
diff --git a/src/main/java/com/webank/wecross/stub/web3/config/Web3AccountConfigParser.java b/src/main/java/com/webank/wecross/stub/web3/config/Web3AccountConfigParser.java
index 954555d..41aa49b 100644
--- a/src/main/java/com/webank/wecross/stub/web3/config/Web3AccountConfigParser.java
+++ b/src/main/java/com/webank/wecross/stub/web3/config/Web3AccountConfigParser.java
@@ -18,8 +18,6 @@ public Web3AccountConfigParser(String configPath, String configName) {
   public Web3AccountConfig loadConfig() throws IOException {
     Web3Toml web3Toml = new Web3Toml(getConfigPath());
     Toml toml = web3Toml.getToml();
-    Web3AccountConfig web3AccountConfig = toml.to(Web3AccountConfig.class);
-    web3AccountConfig.setAccountConfigPath(getConfigPath());
-    return web3AccountConfig;
+    return toml.to(Web3AccountConfig.class);
   }
 }
diff --git a/src/main/java/com/webank/wecross/stub/web3/config/Web3StubConfig.java b/src/main/java/com/webank/wecross/stub/web3/config/Web3StubConfig.java
index 4f4908f..44a746b 100644
--- a/src/main/java/com/webank/wecross/stub/web3/config/Web3StubConfig.java
+++ b/src/main/java/com/webank/wecross/stub/web3/config/Web3StubConfig.java
@@ -15,8 +15,6 @@ public class Web3StubConfig {
   private Service service;
   private List<Resource> resources;
 
-  private String stubConfigPath;
-
   public List<ResourceInfo> convertToResourceInfos() {
     List<ResourceInfo> resourceInfos = new ArrayList<>();
     for (Resource resource : this.getResources()) {
@@ -71,8 +69,8 @@ public void setUrl(String url) {
   }
 
   public static class Resource {
-    private String type;
     private String name;
+    private String type;
     private String address;
     private String abi;
 
@@ -151,14 +149,6 @@ public void setResources(List<Resource> resources) {
     this.resources = resources;
   }
 
-  public String getStubConfigPath() {
-    return stubConfigPath;
-  }
-
-  public void setStubConfigPath(String stubConfigPath) {
-    this.stubConfigPath = stubConfigPath;
-  }
-
   @Override
   public String toString() {
     return "Web3StubConfig{"
@@ -168,9 +158,6 @@ public String toString() {
         + service
         + ", resources="
         + resources
-        + ", stubConfigPath='"
-        + stubConfigPath
-        + '\''
         + '}';
   }
 }
diff --git a/src/main/java/com/webank/wecross/stub/web3/config/Web3StubConfigParser.java b/src/main/java/com/webank/wecross/stub/web3/config/Web3StubConfigParser.java
index fcac873..cd24d94 100644
--- a/src/main/java/com/webank/wecross/stub/web3/config/Web3StubConfigParser.java
+++ b/src/main/java/com/webank/wecross/stub/web3/config/Web3StubConfigParser.java
@@ -18,8 +18,6 @@ public Web3StubConfigParser(String configPath, String configName) {
   public Web3StubConfig loadConfig() throws IOException {
     Web3Toml web3Toml = new Web3Toml(getConfigPath());
     Toml toml = web3Toml.getToml();
-    Web3StubConfig web3StubConfig = toml.to(Web3StubConfig.class);
-    web3StubConfig.setStubConfigPath(getConfigPath());
-    return web3StubConfig;
+    return toml.to(Web3StubConfig.class);
   }
 }
diff --git a/src/main/java/com/webank/wecross/stub/web3/custom/CommandHandler.java b/src/main/java/com/webank/wecross/stub/web3/custom/CommandHandler.java
new file mode 100644
index 0000000..05f167f
--- /dev/null
+++ b/src/main/java/com/webank/wecross/stub/web3/custom/CommandHandler.java
@@ -0,0 +1,27 @@
+package com.webank.wecross.stub.web3.custom;
+
+import com.webank.wecross.stub.Account;
+import com.webank.wecross.stub.BlockManager;
+import com.webank.wecross.stub.Connection;
+import com.webank.wecross.stub.Driver;
+import com.webank.wecross.stub.Path;
+
+public interface CommandHandler {
+  /**
+   * handle custom command
+   *
+   * @param path rule id
+   * @param args command args
+   * @param account if needs to sign
+   * @param blockManager if needs to verify transaction
+   * @param connection chain connection
+   * @param callback callback
+   */
+  void handle(
+      Path path,
+      Object[] args,
+      Account account,
+      BlockManager blockManager,
+      Connection connection,
+      Driver.CustomCommandCallback callback);
+}
diff --git a/src/main/java/com/webank/wecross/stub/web3/custom/CommandHandlerDispatcher.java b/src/main/java/com/webank/wecross/stub/web3/custom/CommandHandlerDispatcher.java
new file mode 100644
index 0000000..612a8df
--- /dev/null
+++ b/src/main/java/com/webank/wecross/stub/web3/custom/CommandHandlerDispatcher.java
@@ -0,0 +1,25 @@
+package com.webank.wecross.stub.web3.custom;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class CommandHandlerDispatcher {
+  private static final Logger logger = LoggerFactory.getLogger(CommandHandlerDispatcher.class);
+
+  private final Map<String, CommandHandler> commandMapper = new HashMap<>();
+
+  public void registerCommandHandler(String command, CommandHandler commandHandler) {
+    commandMapper.putIfAbsent(command, commandHandler);
+  }
+
+  public CommandHandler matchCommandHandler(String command) {
+    CommandHandler commandHandler = commandMapper.get(command);
+    if (Objects.isNull(commandHandler)) {
+      logger.warn(" Unsupported command: {}", command);
+    }
+    return commandHandler;
+  }
+}
diff --git a/src/main/java/com/webank/wecross/stub/web3/custom/RegisterResourceHandler.java b/src/main/java/com/webank/wecross/stub/web3/custom/RegisterResourceHandler.java
new file mode 100644
index 0000000..6df0ce0
--- /dev/null
+++ b/src/main/java/com/webank/wecross/stub/web3/custom/RegisterResourceHandler.java
@@ -0,0 +1,101 @@
+package com.webank.wecross.stub.web3.custom;
+
+import com.moandjiezana.toml.Toml;
+import com.moandjiezana.toml.TomlWriter;
+import com.webank.wecross.stub.Account;
+import com.webank.wecross.stub.BlockManager;
+import com.webank.wecross.stub.Connection;
+import com.webank.wecross.stub.Driver;
+import com.webank.wecross.stub.Path;
+import com.webank.wecross.stub.TransactionException;
+import com.webank.wecross.stub.web3.Web3Connection;
+import com.webank.wecross.stub.web3.common.Web3Constant;
+import com.webank.wecross.stub.web3.common.Web3StatusCode;
+import com.webank.wecross.stub.web3.config.Web3StubConfig;
+import java.util.List;
+import java.util.Objects;
+import org.apache.commons.lang3.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
+
+public class RegisterResourceHandler implements CommandHandler {
+  private static final Logger logger = LoggerFactory.getLogger(RegisterResourceHandler.class);
+
+  private static final TomlWriter tomlWriter =
+      new TomlWriter.Builder().indentValuesBy(4).padArrayDelimitersBy(1).build();
+
+  @Override
+  public synchronized void handle(
+      Path path,
+      Object[] args,
+      Account account,
+      BlockManager blockManager,
+      Connection connection,
+      Driver.CustomCommandCallback callback) {
+    try {
+      if (!(connection instanceof Web3Connection)) {
+        callback.onResponse(
+            new TransactionException(
+                Web3StatusCode.RegisterContractFailed, "connection not instanceof web3"),
+            null);
+        return;
+      }
+      if (Objects.isNull(args) || args.length < 3) {
+        callback.onResponse(
+            new TransactionException(Web3StatusCode.RegisterContractFailed, "incomplete args"),
+            null);
+        return;
+      }
+      Web3Connection web3Connection = (Web3Connection) connection;
+      String contractName = (String) args[0];
+      String contractAddress = (String) args[1];
+      String contractABI = (String) args[2];
+      if (StringUtils.isAnyBlank(contractName, contractAddress, contractABI)) {
+        callback.onResponse(
+            new TransactionException(Web3StatusCode.RegisterContractFailed, "hava blank args"),
+            null);
+        return;
+      }
+
+      String stubConfigFilePath = web3Connection.getStubConfigFilePath();
+      PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
+      Resource stubConfigResource = resolver.getResource(stubConfigFilePath);
+      Web3StubConfig web3StubConfig =
+          new Toml().read(stubConfigResource.getInputStream()).to(Web3StubConfig.class);
+
+      List<Web3StubConfig.Resource> resources = web3StubConfig.getResources();
+
+      boolean existResource = false;
+      for (Web3StubConfig.Resource resource : resources) {
+        if (Objects.equals(contractName, resource.getName())) {
+          existResource = true;
+          resource.setAbi(contractABI);
+          resource.setAddress(contractAddress);
+        }
+      }
+      if (!existResource) {
+        Web3StubConfig.Resource resource = new Web3StubConfig.Resource();
+        resource.setName(contractName);
+        resource.setType(Web3Constant.WEB3_CONTRACT_TYPE);
+        resource.setAddress(contractAddress);
+        resource.setAbi(contractABI);
+        resources.add(resource);
+      }
+      // update config file
+      tomlWriter.write(web3StubConfig, stubConfigResource.getFile());
+
+      // update local and remote
+      web3Connection.refreshStubConfig(web3StubConfig);
+
+      callback.onResponse(null, Web3StatusCode.getStatusMessage(Web3StatusCode.Success));
+    } catch (Exception e) {
+      logger.error(" register contract error", e);
+      callback.onResponse(
+          new TransactionException(
+              Web3StatusCode.RegisterContractFailed, "register contract error"),
+          null);
+    }
+  }
+}
diff --git a/src/main/java/com/webank/wecross/stub/web3/protocol/request/TransactionParams.java b/src/main/java/com/webank/wecross/stub/web3/protocol/request/TransactionParams.java
index 8fce4bc..26280bb 100644
--- a/src/main/java/com/webank/wecross/stub/web3/protocol/request/TransactionParams.java
+++ b/src/main/java/com/webank/wecross/stub/web3/protocol/request/TransactionParams.java
@@ -38,8 +38,6 @@ public TransactionParams(
   }
 
   public enum SUB_TYPE {
-    SEND_TX_BY_PROXY,
-    CALL_BY_PROXY,
     SEND_TX,
     CALL
   }