Energy use per unit of GDP reflects energy efficiency in the process of production and consumption.The change of it has a strong correlation with consumption,technical advance and change of the economic structure.In this paper,we set up an input-occupancy-output factor analytical model of the energy use per unit of GDP in China.The data of the model is based on 30 sectors' energy input-occupancy-output table in 1992,1997,2002 and 2004,and this paper concluded that the total output value of natio...