The intelligent car is driven by the front wheel. The left and right sides of the front wheel are driven by a motor. The front two wheels are modulated to start and stop so as to control the steering. The rear wheel is the Vientiane wheel, which plays a supporting role. Install the tracking photocell on the left and right under the vehicle body respectively. When the sensor on the left side under the car body detects the black line, the main control chip controls the left wheel motor to stop and the car corrects to the left. When the sensor on the right side under the car body detects the black line, the main control chip controls the right wheel motor to stop and the car corrects to the right.