The engineering practice of mini smart car with WiFi wireless remote control function based on ARM and embedded Linux is discussed. The process, method, and experience of engineering practice are introduced. The ARM11 chip is selected as the central control CPU. The WiFi wireless communication module on smart car is used to communicate with remote Android smart phone to receive controlling commands. Controlling commands are sent by the smart phone through the novel ‘gravity sensing’ or traditional ‘key pressing’ mode. Once the commands are received by the ARM chip, it will control the motors via GPIO and drive four wheels to make according actions (moving forward/backward, turning and rotating), and force the car to move in a straight line via PID algorithm. The video data can be collected by camera and the real-time human faces detection is implemented by computer vision algorithms.