Abstract: Driving environment is very complicated, because of the multi-source information of the road, the relative distance with other vehicles or obstacles and driver's state, etc. To obtain more information about the driving, the state messages of the lane, relative distance and speed between the surrounding targets is identified by receiving information from the CCD camera in front of the car, and the driver's attention state information is identified by receiving information from the CCD camera inside, which could effectively reduce the leak detection alarm rate, the false alarm rate and alarm rate of redundancy by using the technology of multi-source information detection. The real-time detection of dangerous or potentially dangerous driving information is used to analyze and judge the driver's state through a constructed safety judgment rule, so as to acquire a reliable anti-collision warning, which is helpful to prevent vehicle collision and optimize the control of the relative distance, relative speed and reaction time. Meanwhile, it also sets a good foundation for the speeding, the increasing of traffic capacity and the realizing of automatic drive.