It is based on the Eighth National College "Freescale" intelligent vehicle competition, this contest requirements to make a model car which can identify the road on the model vehicle platforms independently. If the model car completes contest in accordance with the line for the shortest time that it is winning. Therefore, researching various types of track and the path tracking approach of each group model car is particularly important. First it describes the various types of track, and then describes track recognition principle of each group by using corresponding sensors in detail, finally it analysis how to use sensor to deal with all kinds of circuit method, so that the model car can be quickly and securely through a variety of track, and in the shortest time to reach the end.