Currently, renewable energy generation (REG) in China has experienced rapid development. Although the issue of grid connection rate exists worldwide, it is particularly severe in China. This book proposes a coordinated management mechanism with full consideration of China's resource endowment, technology level and power system. The ultimate coordinated management mechanism for the orderly grid connection of REG is proposed with two sub-mechanisms, the integrated planning coordinated management mechanism and the transmission coordinated management mechanism. With the application of it, an orderly large-scale grid connection of REG will be achieved gradually and the usage efficiency of energy and power will be improved. Besides, aiming at the new development and utilization situation of China's energy sources, this book proposed a new pattern called ''regional multi-energy system'' to promote the energy structure optimization in China. This system ensure the priority of renewable energy sources (RES) in the development and utilization.