Condensate water treatment device, air conditioner and condensate water treatment method

The invention provides a condensate water treatment device, an air conditioner and a condensate water treatment method. The condensate water treatment device comprises a second treatment mechanism which is arranged to perform grease saponification treatment, oil-water separation treatment and grease adsorption treatment on condensate water; and the third treatment mechanism is communicated with the second treatment mechanism and is used for carrying out neutralization treatment and neutralized substance adsorption treatment on the condensate water. The condensate water treatment device is applied to the air conditioner for adjusting the temperature of a kitchen, and can remove grease, small molecular organic matters, organic carboxylic acid substances and the like in condensate water, so that the condensate water discharged from the condensate water treatment device cannot corrode the outer wall surface of a building and cannot corrode a copper pipe of a condenser.