This design applies a STC89C52RC single chip microcomputer (SCM) as a main control chip, and uses the information of road surface transmitted from sensing modules like cameras, infrared sensors and ultrasonic sensors to monitor and identify obstacles and adjust the driving directions of an intelligent car, thereby realizing the functions of velocity measurement and obstacle avoidance. The preliminary experiment of exploring the intelligent car shows that this designing scheme is valuable to refer and apply to some extent.