In this paper,energy consumption in 8 official buildings in Guangzhou was investigated.According to record values of air-conditioning system and other building services systems,energy consumption,especially that used in air-conditioning system was analyzed.It was concluded that the averaged energy consumption was 1.393 GJ/(m~2·a),and that for the air-conditioning system was 0.654 GJ/(m~2·a).In addition,the potential to improve the building energy efficiency in Guangzhou was discussed.