This paper introduces an intelligent robot with the functions of automatic line patrol, positioning and parking, real-time ranging, color recognition and object block transmission. The H bridge drive motor is controlled by Arduino as MCU, so that the intelligent car can realize the functions of forward, backward and steering. The circuit test, hardware debugging, PCB drawing, code improvement and overall structure design in the design process are described in the article. The conclusion is that the robot can realize normal line patrol, parking, ranging, color recognition and block delivery.