Abstract: Using the Computable General Equilibrium (CGE) model, this paper studies the impact of a 5% increase in energy efficiency in all production sectors. GDP will rise by 0.02% in the short run and 0.45% in the long run. Carbon dioxide emissions will rise by 0.09% in the short run and 0.60% in the long run. Therefore, at this stage, only through the improvement of energy efficiency, can not promote the improvement of environmental quality, but can promote economic growth.

Key words: energy efficiency, rebound effect, CGE