The preconditions and approaches for the recycling of the exhaust heat of air conditioners are expounded and conclusion is drawn that it is feasible to make living hot water by recycling the exhaust heat of air conditioners. Furthermore, the problems in the making of the living hot water, such as the collection of the exhaust heat and the issues related to concentrated air conditioning systems, are discussed.   Making hot water with the exhaust heat of air conditioners is helpful to improve the energy consumption efficiency, to save the energy cost and to minimize the environment pollution.