The invention discloses a liquid crystal display device and a drive method thereof. A view angle controlling electrode is arranged on a second substrate (a color filter substrate) of the liquid crystal display device, and voltage is applied to the view angle controlling electrode when a narrow view angle is required, so that an electric filed perpendicular to the direction of a panel is generated among the view angle controlling electrode, and a pixel electrode and a public electrode which are arranged on a first substrate (an array substrate), liquid crystal molecules are subjected to an angle inclination change in the vertical direction, the objectives of inclined-view dark-state light leakage, reduction of the contrast, narrowing of the view angle, and narrow-view-angle display are realized. Accordingly, by adjusting the voltage applied to the view angle controlling electrode, switching between the mode of the wide view angle and the mode of the narrow view angle can be achieved.