diff --git a/Rpc/Client.php b/Rpc/Client.php
index 60187153..af06d124 100644
--- a/Rpc/Client.php
+++ b/Rpc/Client.php
@@ -51,7 +51,11 @@ class Client extends Component
 		if ($isSend === false) {
 			return $this->addError($this->client->errMsg . '(' . $this->client->errCode . ')');
 		}
-		return unserialize($this->client->recv());
+
+		if (is_bool($unpack = unserialize($this->client->recv()))) {
+			return $this->addError('Service return data format error(500)');
+		}
+		return $unpack;
 	}