A new estimation method is proposed, which estimates the energy consumption of the heating, ventilating and air conditioning (HVAC) system from data of a monthly energy consumption of electricity, city gas, petroleum for buildings, and the HVAC system energy consumption for the smallest month of 4 kinds of business facilities in 3 areas is calculated with the simulation method. As comparing with usual method, good agreements of estimation results of proposed estimation method with measured ones is confirmed for two buildings. Based on this method, the HVAC system energy consumption and the cold and hot load consumption of air conditioning of 4 kinds of business facilities in Fukuoka and Kitakyushu are estimated using the data obtained by means of questionnaires, and the local characteristics of the HVAC system energy consumption are analyzed.