The invention relates to a highway inspection system. The system comprises multiple first collection units, multiple second collection units, an inspection record unit and a client. According to the embodiment, a data collection process is completed through the arrangement of the first collection units and the second collection units, then collected inspection data is stored into different databases through the inspection record unit, and each database is linked to a three-dimensional inspection model. In this way, when the three-dimensional inspection model is called and displayed through theclient, the environment of external field equipment and the working situation of inspection personnel can be observed from a three-dimensional perspective visually by use of the visibility of three-dimensional space.