Based on the characteristic of an ultrasonic sensor that can sense the external environment, we design an intelligent vehicle with obstacle avoidance function. First, we use MSP430 as the core of the design system. Then we use the ultrasonic sensors evenly distributed on the round zone of the obstacles, and to process the data and ambient temperature that transmitted from the ultrasonic receiver through the SCM. Finally, we make it to realize the function of intelligent controlling and avoiding obstacles automatically.