A method for driving light adjustments, a device therefor and a light adjustable lamp thereof are disclosed. The method includes: connecting a light source driving circuit which supplies a light source and an MCU with electricity and then the light source driving circuit driving the light source to vary brightness; after disconnecting the light source driving circuit, a temporary power supplying circuit continuing to power the MCU; when the light source is varying brightness and at an instant of disconnecting the light source driving circuit, the MCU obtaining a brightness state of the light source and storing information about the brightness state; after the temporary power supplying circuit is drained, the information vanishing; if the light source driving circuit is connected before the vanishing, the light source working constantly according to the information; and if the light source driving circuit is connected after the vanishing, the light source varying brightness.