Abstract：

As China enters the historical period of rapid urbanization, numerous problems that cannot be resolved by single building energy efficiency design, such as energy consumption reduction of urban transport, energy efficient renovation of existing buildings, the city’s low- carbon energy system, and the rationalization of urban energy flow etc. would require co- ordination at the level of city or community. The urban energy supply can be divided into three levels, namely, urban, community and end user, or into three segments i.e. production, utility distribution and customers. Treats the urban energy consumption as two parts—one for productive purpose and the other for consumptive purpose—and three sectors of industry, transport and buildings. Analyses their characteristics of energy consumption and energy saving measures and proposes the key performance indicators of urban energy efficiency.

Keywords:city,energyefficiency,productiveenergyconsumption,consumptiveenergyconsumption,keyperformanceindicator