Abstract: A double-medium circulation air conditioner for cooling, heating and humidifying comprises: a machine body having an air inlet and an air outlet provided thereon. A heat exchanging fan, a water circulation system, a refrigerant circulation system, a heat exchanger and a humidification system are provided in the machine body. The heat exchanger comprises a water heat exchanging pipe and a refrigerant heat exchanging pipe, which are winded or overlapped together without communicating with each other. The water circulation system is communicated with the water heat exchanging pipe of the heat exchanger. The refrigerant circulation system is communicated with the refrigerant heat exchanging pipe of the heat exchanger. The water circulation system comprises a downhole exchanger, and the humidification system comprises a humidifying water-storage grill set.