An input device and an air conditioner including the same, wherein the input device receives operation input of an air conditioner including an outdoor unit and an indoor unit, and the input device includes a display unit, a communication unit to communicate with the indoor unit, an interface unit to provide an interface for exchanging data with an external device, and a controller to perform control such that a home screen including a plurality of icon items is displayed on the display unit and to perform control such that temperature information set through a temperature setting item in the home screen is transmitted to the external device through the interface unit.