The invention discloses an air conditioner indoor machine. The air conditioner indoor machine comprises an air conditioner indoor machine box body, a heat exchanger, a draught fan, a room return air inlet and a room air supply outlet. The air conditioner indoor machine is characterized by also comprising an outdoor pipe cover, an outdoor air pipe, an outdoor air inlet, an indoor return air inlet, a mixed air duct, a purifier I and a purifier II, wherein the outdoor pipe cover is connected with one end of the outdoor air pipe, the other end of the outdoor air pipe is connected with the outdoor air inlet, the room return air inlet is communicated with the indoor return air inlet, one side of the mixed air duct is connected with the outdoor air inlet and the indoor return air inlet, the other side of the mixed air duct is connected with one side of the purifier I, the other side of the purifier I is connected with one side of the draught fan, the other side of the draught fan is connected with one side of the purifier II, the other side of the purifier II is connected with one side of the heat exchanger, and the other side of the heat exchanger is connected with the room air supply outlet; and two ends of the air conditioner indoor machine box body can be provided with an adjacent room return air inlet and an adjacent room air supply outlet, and the inner part of the air conditioner indoor machine box body can be provided with a temperature regulator and a humidity regulator.