Population, economy, energy and environment are the four essential factors of sustainable development. The dynamic variation track, geography center and their inherent mechanism can be described by Gravity center theory. Based on the statistics from 1985 to 2009, centers of gravity for energy production, consumption and CO2 emission in China were studied in this paper. The results showed that centers of gravity for energy production, consumption and CO2 emission in China are changing from north to south. The center of gravity for energy production has a more apparent westward character while the southward character of energy consumption is notable.