A water dispenser comprises a chassis, an evaporator for condensing and liquefying water vapor in the air is installed in the middle of the chassis, a water receiving tank is installed under the evaporator in the chassis, a reverse osmosis water purifier is installed above the evaporator in the chassis, and a diaphragm pump connected with the water inlet end of the reverse osmosis water purifier is installed in the water receiving tank; a water receiving port is for on that front side of the chassis, and a hot water outlet head and a cold water outlet head are installed on the top of the waterreceiving port. An air filtration assembly is instal under that water receiving tank in the chassis, the air filtration assembly comprises a water tank, a water spray plate fixedly connected to the upper end of the water tank, and a water pump installed in the water tank, and the water outlet end of the water pump is communicated with the water spray plate through a pipe. The invention can realize the production of drinking water and air purification only by supplying electric power, and is suitable for households in areas with drought, water shortage or serious water pollution.