Method and device for controlling mobile terminal screen brightness and mobile terminal

The invention provides a method and a device for controlling the mobile terminal screen brightness and a mobile terminal, wherein the method comprises the following steps: the mobile terminal obtains an application program which is used by a user currently; the mobile terminal searches a brightness group list according to the application program which is used currently so as to obtain the brightness group to which the currently used application program belongs, wherein the brightness group list comprises a plurality of brightness groups, and each brightness group corresponds to a plurality of application programs; the mobile terminal obtains the brightness value according to the belonging brightness group of the application program which is used currently; and the mobile terminal controls the mobile terminal screen brightness according to the brightness value. According to the method provided by the embodiment of the invention, the screen brightness is automatically regulated according to the application program which is used currently, the unnecessary electricity waste of the mobile terminal is reduced, the service time of a mobile terminal battery which is charged for the first time is prolonged, a good electricity-saving effect is obtained, and user experiences are improved.