Adjust the water temperature of the cooler by controlling the rotating speed of the cooling system motor. Finally, the function of controlling the temperature of the cooling system is achieved. The control unit has the function of self-diagnosis. During the operation of the cooling system, the cooling control system can reliably record and store relevant information such as running state and faults, and can exchange data with the portable PC through the standard maintenance port (Ethernet). The control unit has fault recording function. The fault information includes at least: the fault code, the time when the fault occurred and disappeared, and the number of repeated failures. TRDP real-time communication system is adopted for communication of cooling system.