The invention relates to a visual detection method for mobile phone camera glass. The visual detection method comprises the following operation steps: 1, feeding; 2, detection: (1) side wall detection, (2) first front and back detection, (3) upper surface detection, (4) second front and back detection, (5) lower surface detection, (6) upper surface metal ring color detection, and (7) size surfacedetection; 3, image processing; and 4, discharging. The invention further provides a visual detection system for mobile phone camera glass, the system comprises visual detection equipment and a computer with an algorithm for processing images, and the visual detection equipment comprises a workbench, an annular sliding rail arranged on the edge of the workbench and all detection station mechanismssequentially arranged on the workbench. A feeding manipulator, a discharging manipulator and the visual detection equipment integrated with all the detection stations are adopted for detection, so that full-automatic detection is truly realized. In addition, all the detection stations guarantee comprehensive detection of defects of the mobile phone camera glass, it is guaranteed that no dead angle exists in detection, and the detection efficiency is high.