The invention discloses a light condensation and heat collection type air source water heater. The air source water heater comprises a heat preservation water tank, a condenser, an evaporator, a Fresnel lens and an air source water heater shell; a fixing frame is arranged above the air source water heater shell; the Fresnel lens is arranged in the fixing frame; an evaporator is arranged on the position, below the Fresnel lens, inside the air source water heater shell; fans are arranged below the air source water heater shell; and an expansion valve is arranged on a pipeline at the input end of the evaporator and communicates with a liquid storage tank through a pipeline. According to the air source water heater, under the focusing effect of the Fresnel lens, sunlight can be focused and heat can be collected, the focused sunlight is focused on the evaporator, meanwhile, the fans are started to work, air heat energy above the evaporator can be discharged from an exhaust hole after passing through the evaporator, under condensation irradiation of the sunlight and heat exchange of the air heat energy, the heat exchange efficiency of the evaporator can be improved, and water in the heat preservation water tank can be heated.