The viewpoint of condenser heat recovery and reuse is proposed by according to the technical characteristics of household air-conditioning system.The heat recovery system can be widely used for domestic hot water supply.A household air conditioner with domestic hot water supply(HACDHWS) system is set up in our laboratory.The HACDHWS system can work in air cooling operation mode and in circulating water cooling operation mode.Experimental data are shown.Corresponding analysis and comparisons of the operational characteristics between the two modes are given in this paper.Some main parameters results are presented and the impacts of variation in water temperature on the HACDHWS system performances are discussed in this paper.The result shows that the original performances of the household air-conditioning system is not obvious affected and the EERC+w of the HACDHWS system is improved as long as the temperature of domestic hot water supply in water tank for storing heat is properly controlled.