Intelligent Vision Inspection Robot of metro vehicles is an important node in the intelligent maintenance management platform of metro. Through the autonomous mobile robot platform combined with image recognition processing technology, it can accurately image the key maintenance points under the vehicle and intelligently judge the abnormal state of the key components under the vehicle. Cutting-edge technologies such as intelligent robot technology, autonomous navigation technology, high-definition optical imaging technology and deep learning algorithm are adopted to efficiently solve the problems of high risk, fatigue and low efficiency existing in manual operation of vehicle bottom maintenance. It is suitable for daily maintenance and inspection of the bottom of various metro vehicles.