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In a small solar photovoltaic and thermoelectric system, automatic tracking system is often used in order to improve the efficiency of power generation. An optimal design of the structure of photosensitive resistance and tracking panels for the current adaptive tracking system is presented. An adaptive tracking system based on photosensitive resistance is proposed due to the complication of structure of automatic tracking system based on photodiode. In order to achieve tracking the target, the adaptive tracking principle based on negative feedback is used. Through software design, tracking accuracy is controlled with adding the anti-shake control system. In terms of hardware designing, photosensitive resistance is used to induce intensity of light. And AD conversion circuit and steering engine are applied. Ultimately the solar photovoltaic and thermoelectric panel is driven to move until the panel is perpendicular to the sun light. In addition, the optimal design of structure of the panels is considered to adjust the area of tracking. Finally, the mechanical structure design of the whole device, the design and simulation of circuit diagram are implemented. The results show that the design of the mechanical device is simpler and easier to actualized while compared with the existing photoelectric diode spot-tracking system and the tracking stability is improved.