Compared with the commonly used thermal power generation system, the advantages of solar photovoltaic power generation are mainly reflected in: ① no danger of depletion; ② safe and reliable, no noise, no pollution emissions, the absolute clean (pollution-free); ③ not limited by the geographical distribution of resources , Can take advantage of the roof of the building; ④ no need to consume fuel and set up transmission lines can be local power supply; ⑤ high energy quality; ⑥ users from the emotional easy to accept; ⑦ short construction period, access to energy to spend a short time. Disadvantages: ① irradiation of the energy distribution density is small, that is, to take up a huge area; ② access to energy with the four seasons, day and night and sunny weather conditions. The Origin and Development of Solar Photovoltaic Power Generation