The invention discloses a household triple-generation central air conditioning hot and cold water unit. The unit includes an air-conditioning controller, a central air conditioning unit and an air-conditioning water heater unit. After the unit starts to operate, tap water is injected from the water inlet of an air-conditioning water heater water tank body; according to the work principle of an air-conditioning unit, coil pipes in the water tank can radiate a lot of heat, so that water in the water tank can be heated; and the heated water flows out through the hot water outlet, and can be takenas daily domestic water for beauty salons (SPA), military camp, villas, agriculture, households, etc. When the air-conditioning unit is used to solve indoor temperature adjusting, radiated heat can be utilized to heat water injected in the water tank body; heated water can freely supply to users for daily domestic water and substitute existing heating water and heating modes such as fire coals, fuel oil and electric water heaters in north area; and therefore, massive non-renewable fossil energy can be saved, and environmental pollution and haze weathers can be effectively reduced.