The utility model provides a control system for an air conditioner. The control system comprises a memory, a display, a sensing and identification module and a control module, wherein the memory stores air conditioner control information for a user to select; the sensing and identification module senses different gestures of the user, and outputs different signals representing whether the control information is selected or not; and the control module is connected with the memory, the display and the sensing and identification module, sequentially displays different control information for the user to select through the display, and determines selected air conditioner control information according to the signals representing whether the control information is selected or not to control gesture input control over the operation of the air conditioner. The gestures of the user are sensed to confirm the control information for controlling the operation of the air conditioner, so that the influence of inconvenient operation such as whether hands of an operator are dirty and wet or not on contact control is avoided, and point contact misoperation caused by a small interface and excessive sensitivity of a touch screen also can be avoided; and in addition, the user can be prevented from memorizing the control information represented by different gestures, so that the air conditioner can be conveniently controlled, and user experiences are enhanced.