The utility model discloses a yellow irrigation pumping station clear water vacuum test and control system are taken out to water conservancy, including vacuum degree detection device, interface control unit, clean water valve door and actuating mechanism, the output of clean water valve door links to each other with the input of vacuum degree detection device, and the output of vacuum degree detection device links to each other with the input of interface control unit, and the output of interface control unit links to each other with actuating mechanism's input. The detection method of this system is for adopting heat -conducted flow sensor and vacuum negative pressure power to detect the method that the sensor combined together, with the water traffic signal and burden pressure signal who detects, carry out analysis processes through the signal conditioning treater, get rid of falseness and interfering signal, work through PLC signal control output module driving actuator to handling the back signal, the start -up operation of control pump, it is short -lived to have overcome detecting element, the frequent change, detect the poor drawback of the precision and the degree of accuracy, control accuracy has been improved, the manpower has been saved, material resources, the efficiency of work is improved.