The utility model discloses a ventricular assist device's watch -dog belongs to the ventricular assist device field, and it includes data processing module, wireless communication module, data disaply moudle, network communication module and network monitoring center, follows send in the ventricular assist device equipment state information physiology information is passed through wireless communication module carries to data processing module and handles, and the data after the processing are passed through the data disaply moudle shows and/or passes through the transmission of network communication module extremely the network monitoring center. The utility model discloses a ventricular assist device's watch -dog accessible radio communication and the internal implanted ventricular assist device of patient carry out data transmission, and have functions such as data storage, authority setting and early warning protection.