Abstract: Living hotwater heating system is one of the key systems for a hotel to realize energy conservation. There is a variety of energy supplies for heating such as the recovery of waste heat and the utilization of natural heat source which are major countermeasures to reduce the energy consumption of hotwater heating. In allusion to the meteorological conditions of Hangzhou, based on the analysis of various utilization characteristics of heat sources, the configuration for applicable heat sources is summarized, and full consideration is made on the performance advantages of all kinds of heat sources under different season and temperature conditions, upon which a multi-energy complementary living hotwater heating system is proposed combined with solar energy, air heating pump and condensing boiler. The system enables a reasonable optimization of heat sources under applicable conditions so as to reduce operating energy consumption, which offers a feasible scheme for hotel improvements in living hotwater energy conservation.