In view of the heavy workload of tennis pickup in tennis court,as well as the problems of large size,poor flexibility and low efficiency of the existing tennis picking robots,an intelligent small mobile robot capable of automatic tennis picking based on STM32 was designed.The robot's mechanical structure was presented by constructing its 3D model.The robot adopted the centroid method to obtain target's coordinate information,and realized acts including target search,tennis pick and tennis deposit automatically,under the effective cooperation of its machine vision module,the walking steering gear,the universal wheel,and the double mechanical arms.The experiment results showed that the robot can quickly locate and collect tennis with high precision up to 98%.