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In order to effectively ensure the visual servo control effect of mobile robots and improve the accuracy of visual servo control, a visual servo control system for mobile robots based on virtual reality technology was designed. Complete the hardware design of the system through I/O devices, pose sensors, visual image processors, and servo controller components in virtual environments such as 3D visual sensors and stereoscopic displays. From the aspects of kinematics and dynamics, build the mathematical model of mobile robot, use the calibrated visual camera to generate the real-time visual image of mobile robot, and complete the image preprocessing through image filtering, distortion correction and other steps. Utilize visual images to construct a virtual mobile environment for mobile robots. Under virtual reality technology, the action route of mobile robots is planned through steps such as target positioning, route generation, collision detection, and route adjustment. Through the calculation of control variables, visual servo control functions are achieved. The system testing results show that the designed control system has small position control errors, with attitude angle and movement speed control errors of only 0.05 ° and 0.12m/s. The mobile robot has fewer collisions and has good visual servo control effect, which can effectively improve the visual servo control accuracy of the mobile robot.