The invention discloses a bearing defect automatic detection system based on multi-angle light source images. The bearing defect automatic detection system comprises an acquisition unit, a PC end processing unit, a data analysis unit, an intermediate processing unit and a defect detection unit. According to the system, image capturing detection is carried out under the multi-light-source illumination condition, the tiny error can be better detected, the problem of identifying a specific identifier on a bearing is solved, and detection is more intelligent. The system not only comprises softwarein the aspect of bearing image processing, but also independently builds a matched detection processing hardware framework, and simulates the industrial automatic bearing detection process, so that the whole system can smoothly run to achieve the purpose of automatically screening bearings, and meanwhile, the system is more suitable for practical application.