diff --git a/src/main/java/bdledger/api/Client.java b/src/main/java/bdledger/api/Client.java
index 9f95f32..db2c90f 100644
--- a/src/main/java/bdledger/api/Client.java
+++ b/src/main/java/bdledger/api/Client.java
@@ -1,10 +1,8 @@
 package bdledger.api;
 
-import bdledger.api.grpc.common.Block;
-import bdledger.api.grpc.common.Transaction;
-import bdledger.api.grpc.node.ClientVersionResponse;
 import bdledger.api.grpc.common.TransactionType;
 import bdledger.api.grpc.ledger.*;
+import bdledger.api.grpc.node.ClientVersionResponse;
 import bdledger.api.grpc.node.NodeGrpc;
 import bdledger.api.grpc.query.*;
 import com.google.common.util.concurrent.ListenableFuture;
@@ -278,7 +276,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回全网区块的数量</a>
+   * href="#">返回符合条件的区块的数量</a>
    * （非阻塞）
    */
   public ListenableFuture<CountBlocksResponse> countBlocks(String ledger) {
@@ -295,7 +293,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回全网区块的数量</a>
+   * href="#">返回符合条件的区块的数量</a>
    * （阻塞）
    */
   public CountBlocksResponse countBlocksSync(String ledger) {
@@ -414,6 +412,44 @@ public class Client {
     return reqBuilder.build();
   }
 
+  /**
+   * <a
+   * href="#">返回符合条件的数量</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<CountTransactionsResponse> countTransactions(String ledger) {
+
+    info("*** blockNumber: ledger={0}", ledger);
+
+    try {
+      return queryFutureStub.countTransactions(transactionsRequest(ledger));
+    } catch (StatusRuntimeException e) {
+      warning("RPC failed: {0}", e.getStatus());
+      return null;
+    }
+  }
+
+  /**
+   * <a
+   * href="#">返回符合条件的事务的数量</a>
+   * （阻塞）
+   */
+  public CountTransactionsResponse countTransactionsSync(String ledger) {
+
+    info("*** blockNumberSync: ledger={0}", ledger);
+
+    try {
+      return queryBlockingStub.countTransactions(transactionsRequest(ledger));
+    } catch (StatusRuntimeException e) {
+      warning("RPC failed: {0}", e.getStatus());
+      return null;
+    }
+  }
+
+  private TransactionsRequest transactionsRequest(String ledger) {
+    return TransactionsRequest.newBuilder().setLedger(ledger).build();
+  }
+
   private void info(String msg, Object... params) {
     logger.log(Level.INFO, msg, params);
   }