According to the high speed precision dual ceramic roller bearing of testing machine of research and development needs, a design of the control system of the test machine was given. The system was contained of programmable logical controller (PLC) unit, sensors unit, and used manmachine interface (MMI) as touch screen. The system had automatic computing, storage, print data function. According to proportion integration difference (PID) control principle, the change of acceleration speed of electric spindle quantity was controlled by five stage algorithm for S curve to realize the accurate control of the electric spindle start, stop and acceleration and deceleration stage. The touch screen was used to dynamically display the test data by using the curve form of visual display. The results show that the operation of the motor can realize start and stop quickly without impact, and the system has high control accuracy, good dynamic performance, and stable operation, and the system completely satisfies the requirements of bearing test machine.