Abstract: This paper introduced the structure, function and characteristics of the auxiliary monitoring and record system. Field applications shows that the auxiliary monitoring and recording system, basing on the existing equipments and distribution pattern, connects the decentralized control systems by application of network communication technology and provides data for equipments analysis and operation monitoring of the water supply, hydraulic devices, pumps, air compressor and gate. It is of high value. It was pointed out that the monitoring and record system was the supervisory control system. As well, the limitations encountered in practice were presented, for reference.