The invention discloses a multipurpose air energy clothes drying water heater device which comprises an air energy water heater and a clothes drying tank. The air energy water heater comprises a main machine, a line controller and a heat preservation water tank. The clothes drying tank comprises a movable door, a heat insulation door and a connecting port. The heat insulation water tank comprises a metal liner, a condenser and a temperature sensing bag. A heat preservation layer is arranged at the upper end of the metal liner. The upper end of the metal liner and the connecting port of the clothes drying tank are connected in a closed mode. The heat insulation door is installed on the connecting port of the clothes drying tank. When the multipurpose air energy clothes drying water heater device is manufactured, on the basis of not changing a common air energy water heater basic structure, the clothes draying tank is added on the original heat preservation water tank. In the using process, the line controller is utilized for controlling the condenser to heat water inside the metal liner and the metal liner, cloths drying work of the cloths drying tank is controlled by opening and closing the heat insulation door, heat is radiated and dissipated to a cloths drying cavity of the cloths drying tank, the water heater has the cloths drying function and the hot water supplying function, and the manufacturing cost is reduced.