By cointegration and vector error correction model method

long-term equilibrium relationships among power consumption and economic factors including GDP

the investment scale of fixed assets

population scale in China are analyzed.According to regularity of electric demand and economic development

power consumption in 2006-2010 is forecasted.Through Granger causality test

long steady causality and bi-relationships between power consumption and GDP

the investment scale of fixed assets are proved

explaining high growth of electric demand indirectly due to high economic growth.This offers scientific basis for the development of power industry and national economy

and for macroadjustments and controls.