In order to deal with the shortage of the energy resources, the environment deterioration and the global warming, it is necessary and important to develop the renewable energy rapidly for all the countries in the world including China. In this paper, based on the characteristics of the renewable energy generation such as randomness and intermittence, the new models of the power planning and production simulation were built; the study of the power source structure and power flow of China in 2050 and its comprehensive benefit evaluation was proposed; the roadmap of the high penetration renewable energy in China and the relevant policy suggestions were also put forward.