A system for changing a control interface of a controlled device based on functions of the device, comprising: a controlled device, having a first working mode or a second working mode; an interface, having a visual unit performing displaying in a first display mode or a second display mode and an operation unit operated by a user to receive an operation message of the user, wherein the visual unit has a first display portion and a second display portion, and the first display portion and the second display portion separately perform displaying by using light; characterised by a recognition and control unit, configured to recognize a possible working mode of the controlled device, wherein when the controlled device is a device with the first working mode, the visual unit is configured to perform displaying in the first display mode, and the operation unit is configured to perform a first operation mode for operation by the user, and when the controlled device is a device with the second working mode, the visual unit is configured to perform displaying in the second display mode, and the operation unit is configured to perform a second operation mode for operation by the user, wherein the first working mode comprises a first mode and a second mode; the second working mode comprises the first mode, the second mode, and a third mode; when the visual unit performs displaying in the first display mode, the first display portion displays a message of the first mode, and the second display portion displays a message of the second mode; when the visual unit performs displaying in the second display mode, the first display portion displays a message of the first mode, the second display portion displays a message of the second mode, and the first display portion or the second display portion displays a message of the third mode; wherein the first operation portion and the second operation portion are buttons respectively and light produced by the first display portion and light produced by the second display portion are respectively emitted through a first operation portion and a second operation portion. a controlled device, having a first working mode or a second working mode; an interface, having a visual unit performing displaying in a first display mode or a second display mode and an operation unit operated by a user to receive an operation message of the user, wherein the visual unit has a first display portion and a second display portion, and the first display portion and the second display portion separately perform displaying by using light; a recognition and control unit, configured to recognize a possible working mode of the controlled device, wherein when the controlled device is a device with the first working mode, the visual unit is configured to perform displaying in the first display mode, and the operation unit is configured to perform a first operation mode for operation by the user, and when the controlled device is a device with the second working mode, the visual unit is configured to perform displaying in the second display mode, and the operation unit is configured to perform a second operation mode for operation by the user, wherein the first working mode comprises a first mode and a second mode; the second working mode comprises the first mode, the second mode, and a third mode; when the visual unit performs displaying in the first display mode, the first display portion displays a message of the first mode, and the second display portion displays a message of the second mode; when the visual unit performs displaying in the second display mode, the first display portion displays a message of the first mode, the second display portion displays a message of the second mode, and the first display portion or the second display portion displays a message of the third mode; wherein the first operation portion and the second operation portion are buttons respectively and light produced by the first display portion and light produced by the second display portion are respectively emitted through a first operation portion and a second operation portion.