According to the statistics data and planning material from the authority, the power source structure of China is analyzed and the clean power prospect is forecasted, which aim to explore occurring to CO2 emissions reduction in the power industry. Based on The national greenhouse gas list guide published by Inter-governmental Panel on Climate Change (IPCC) in 2006, the trend of clean energy reduction CO2 is predicted. In recent years, the clean energy power is developing quickly, while the share of thermal power gradually declines. By the end of 2010, the percent of thermal power in the total installed capacity is 73.44%, while the hydropower, and wind power and nuclear power accounts for 26.53%. The contribution of thermal power to generated energy is 80.76%, while the clean power is 19.22%. The capacity of thermal power unit with above 300 MW is predominate, accounting for 80%. In 2020, the installed capacity of hydroelectric power, wind power and nuclear power will reach 402 million kW, 150 million kW and 70 million kW, respectively. The corresponding annual energy production of three kinds of clean energy can reach 1.75 trillion kW•h, 314.55 billion kW•h, and 554.68 billion kW•h, which can reduce CO2 emissions 1534, 276, 486 million tons, respectively. It is estimated that a total of 2.296 billion tons CO2 emissions will be reduced in 2020.