In this paper,the energy consumptions of 22 hospital buildings in Tianjin were firstly investigated,the average value was 348.5 kWh/(m2·a).Secondly,according to the baseline determine method of CDM,four kinds of static baseline scenarios and the dynamic baseline were proposed based on the investigation information.Thirdly,by analyzing the relationships of different baselines,the average energy consumptions and carbon emission levels of the investigated hospital buildings in 2010 were recommended as the baseline scenario.For general hospital buildings,the energy consumption baseline was 381.2 kWh/(m2·a)and the carbon emission baseline was 157.29 kgCO2/(m2·a),while for the specialist hospital buildings,the values were of 309.3 kWh/(m2·a)and 130.46 kgCO2/(m2·a),respectively.