Collector is the heart of solar heat system. The main function of collector is to convert solar radiation into heat and then provide the working fluid loop with heat. Sunlight passes through transparent lids to reach the absorbing plate. Through the specific processing of the panel, the solar energy is converted into heat and the heat could be brought by the fluids in the absorbing tubes. The whole absorbing panel, absorbing tubes, and lids are fixed by outer frames. Insulation materials serve as the stuff occupying in the middle to prevent the loss of heat.