Abstract: The power generation module of the new energy photovoltaic plant is the main equipment for transforming electric energy. Due to external factors or material loss, it will occur in the operation of cluster connection failure, diode failure, hidden cracking, occlusion and other defects that affect the power generation efficiency of the power station. Such defects appear in the form of hot spot effect. The causes of hot spots are distinguished by analyzing and processing the hot spots based on the color and shape differences in infrared images. And the use of computer information processing technology can improve the efficiency of photovoltaic module hot spot detection, and more quickly statistics, classification, summary of the effect of power generation module hot spot effect on the power generation results. It is of great significance to find hidden dangers and eliminate defects of equipment in time and to improve the efficiency of power generation and the safe and stable operation of equipment.