Abstract:China is in the process of constructing an all-round, well-off society. Under the current circumstances of growing population, increasing economic development and daily energy consumption, a realistic forecast of energy demand and supplement is of particular importance for guaranteed energy supply, progressive economic development and limited CO 2emission for a sustainable development of the society. By analyzing the mode of energy consumption and population and economic development, we predict energy demand and CO2emission in the new periodical with system dynamics approach, and then advance suggestions and countermeasures for energy development and released CO₂limit.