The present disclosure discloses a light source driving device, and the light source driving device comprises a sensing unit and a processing unit, wherein the sensing unit at least comprises a microwave sensing module; the sensing unit is at least used for sensing whether any human activity exists within the action range based on microwave sensing according to a certain microwave sensing cycle, and periodically outputting a sensing signal to the processing unit; and the processing unit is used for processing the sensing signal, so that the driving device can adaptively control the turn-on and turn-off of the light source and the brightness change of the light source. Based on this, a dynamic intelligent light source driving device without a user's turn-on and turn-off action and based on environmental state sensing is realized.