According to statistics, the annual total solar energy is 1 1018 kW h, which is equivalent to 13 trillion tons of standard coal. Meanwhile, it is about 1000 times the proven oil reserves, and it is ten thousand times more than total annual energy consumption of the world. China is located in the northern hemisphere, and spans of north-south and east-west are both more than 5000 km. The unique geographical features bring abundant solar energy resources for China. Statistics from the long term observation in about 700 meteorological stations in China show that the annual solar radiation amount per square meter all over the country is between 3.3 106 kJ to 8.4 106 kJ, and the mean value is 5.9 106 kJ [17,26,31]. At the same time, the annual total solar energy resource is equivalent to 1.7 trillion tons of standard coal, so there is great potential for
solar energy development and utilization in China.