Based on the GDP-CPI model in economy, this paper studies the E-CPI model of electricity consumption and CPI. This model can make a monthly dynamic analysis of the economic performance and study what fiscal and monetary policy should be used to realize the macro regulation for government decision-making. The E-CPI model is used to analyze China's economic performance and the regulation effects of macro policies in 2011. In the end the paper makes a study of the fiscal and monetary policy tendency in 2012 according to the economic development goal, and proposes some suggestions for reference.