The invention discloses an air processing device and an air conditioner indoor unit provided with same as well as an air conditioner. The air processing device comprises a housing, a guide fan and a water processing module, wherein the water processing module comprises a wet film, a water container, a water applying part and a water fetching part; the water container is connected with the water applying part to supply water to the water applying part, and the water applying part is used for applying water to the wet film; and the water fetching part can be rotatably arranged in an air processing air flue and can be used for guiding water in the water container to air and/or the wet film. According to the air processing device disclosed by the invention, the water processing module is arranged, and the water processing module is equipped with the wet film, the water container, the water applying part and the water fetching part. The water applying part and the water fetching part can apply water to the wet film, and the water fetching part further can automatically rotate to spray out water in the water container and form water mists in the air processing air flue. The water mists and water molecules in the wet film can adsorb dust, dust particles and the like in indoor air for blending the dust, the dust particles and the like into clean water, so that the effects of improving air humidity and purifying air can be realized.