The invention provides a management method of an intelligent power grid demand side. The method comprises the steps that (1) modeling is carried out based on a demand side user; (2) renewable energy sources are optimized in advance; and (3) the game theory is used for solving an accumulation expenditure function of the demand side and a corresponding Nash equilibrium point in an optimization mode. According to the method, renewable energy sources are used in distributed generation, the mode that the renewable energy sources and non-renewable energy resources are used for generating energy resources at the same time is used, energy source transmission cost and production cost are lowered, and the problems that in a traditional power grid, environmental pollution is severe, and demand side user expenditure is high are solved. In addition, from the point of sustainable development, using of the renewable energy sources is beneficial for sustainability of ecology, society, economy and science and technology, the using rate of natural resources is improved, and harmony between man and nature is promoted.