Distributed motion control technology is widely used in beam control system of laser facility. Motion control system in large laser facility has a large number of controlled objects, a higher command of parallel control and online diagnosis. Motion control supervising system based on KingSCADA is implemented independent of original motion control system. Status of control device is supervised and recorded. The online diagnosis ability of the control system is improved. Motion control supervising system is implemented in a laser automatic alignment system. A large number of historical operating data of the controlled device are recorded. The motor fault is recorded and inquired. The implement of motion control supervising system provide the research foundation of intelligent fault diagnosis and prediction.