Electric toothbrush apparatus and controlling thereof

Disclosed are an electric toothbrush apparatus and a method for controlling thereof. The electric toothbrush apparatus of the present invention comprises: an electric toothbrush body; an operating device arranged inside the electric toothbrush body; a movable rod combined to the operation device and reciprocated by the operating device; a cam member combined with the electric toothbrush to be rotated and combined with the movable rod to be rotated according to the reciprocation of the movable rod; a circling rod combined with the cam member to circle according to the rotation of the cam member; and a mouthpiece combined with the circling rod.