The invention provides an air-conditioner air duct device and an air-conditioner. By improving the structure of a volute air duct, the indoor air quantity of the air-conditioner is improved at the same time of keeping noise unchangeable, and meanwhile, the refrigerating and heating properties of the air-conditioner are improved. The invention is realized by the following technical scheme that: the air-conditioner air duct device comprises a volute cover, an upper volute and a lower volute in turn from top to bottom; the upper volute and the lower volute are combined to form an air inlet positioned on one lateral surface and a volute structure air duct positioned in the interior, and the air inlet is the one of the volute structure air duct; the upper volute is provided with an air duct outlet; the volute cover is combined with the upper volute to form an air outlet frame; and the air is discharged from the air duct outlet through the air outlet frame. The air-conditioner uses the air duct device and is a window-type air-conditioner.