Abstract: In China’s 14th Five-year Plan it is put forward to construct new-type power system, in which new energy is taken as the main body, such policy will provide assistance for both energy source structure optimization and low carbon construction in China, meanwhile it puts forward new demands on the accommodation of new energy and the stability of power supply and demand. According to present basic situation of new energy participated in electricity market in present phase, by means of constructing the complementary cooperation alliance of thermal power at the supply side and new energy sources as well as constructing the interactive cooperation alliance of the adjustable load on both sides of supply and demand and new energy, through diversified forms such as message complementary, power flow interchange and so on, effective improvement of new energy accommodation and electricity market efficiency improvement of power cooperation alliance were improved. The effect of the proposed model in promoting new energy accommodation, reducing the deviation of electricity market and improving the benefit of the cooperation alliance is verified by simulation cases.