Aiming at the demands of fatigue driving monitoring,a drowsiness detection system based on High-speed DSP TMS320DM642 from TI Inc was designed.It can determine the driver’s level of attention,and reduce the number of traffic accident.This system uses the machine vision method to get video sequences of a driver from the CCD camera,and than detects the face,eyelid to determine the state of drowsiness by the PERCLOS criterion.The experimental results show that this system has higher accuracy and speed,and can satisfy the demands of non-contact,all illumination condition and real-time monitoring.