Abstract: This paper analyzes the impacts of coal price decline on the related variables of energy-economy- environment system in China based on a computable general equilibrium model. The result shows that the total demand of coal and energy rises, and the demand of oil, natural gas and clean power decreases. The total carbon emissions and the emission intensity of GDP increase. The output of most departments has different degrees rise. The macroeconomic value variables have different degrees decline; the actual macroeconomic variables have different degrees rise.