Automatic solar tracking can significantly improve the photoelectric conversion rate of solar cells per unit area. We propose a new type of photo-electric tracking system. This system tracks the position of sun by using the projection of lever with a circular array consisted of 16 photosensitive resistance and implements automatic tracking by adjusting the angle of solar panels intermittently. The test results show that the tracking system can improve the power generation efficiency by 33.04% compared to the system with fixed angle, and can also reduce consumption of mechanical energy by more than 50% compared with real-time tracking system.