A lamp device for a vehicle in form of a vehicle headlamp, a turn signal lamp, a fog lamp, a brake lamp, or a rear lamp, and being configured to dynamically adapt to different lighting modes by utilizing one or more bendable light-emitting units, the lamp device comprising: a lamp housing; a light-emitting unit disposed in the lamp housing and comprising a light-emitting surface that is configured to be adjustable in at least one of a shape, an intensity of illumination, or a color of illumination; a bracket configured to support the light-emitting unit to be mounted in the lamp housing, and configured to change the shape of the light-emitting surface of the light-emitting unit; a driving unit configured to apply a driving force to the bracket that changes the shape of the light-emitting surface of the light-emitting unit, a driving unit controller configured to control the driving unit; and a light emission controller configured to control the intensity of illumination and the color of illumination emitted from an entire region or a partial region of the light-emitting surface of the light-emitting unit, the lamp device configured to at least partially change, based on a plurality of lighting modes, at least one of the shape of the light-emitting surface, the intensity of illumination emitted from the light-emitting surface, or the color of illumination emitted from the light-emitting surface, and wherein the light-emitting unit is disposed in surface contact with a first surface of the bracket, and based on the driving unit applying the driving force to the bracket, the light-emitting surface of the light-emitting unit is changed in shape in conjunction with a change in shape of the bracket, wherein the driving unit comprises: an operating rod connected to a rear surface of the bracket; and a driving motor configured to drive the operating rod. a lamp housing; a light-emitting unit disposed in the lamp housing and comprising a light-emitting surface that is configured to be adjustable in at least one of a shape, an intensity of illumination, or a color of illumination; a bracket configured to support the light-emitting unit to be mounted in the lamp housing, and configured to change the shape of the light-emitting surface of the light-emitting unit; a driving unit configured to apply a driving force to the bracket that changes the shape of the light-emitting surface of the light-emitting unit, a driving unit controller configured to control the driving unit; and a light emission controller configured to control the intensity of illumination and the color of illumination emitted from an entire region or a partial region of the light-emitting surface of the light-emitting unit, the lamp device configured to at least partially change, based on a plurality of lighting modes, at least one of the shape of the light-emitting surface, the intensity of illumination emitted from the light-emitting surface, or the color of illumination emitted from the light-emitting surface, and wherein the light-emitting unit is disposed in surface contact with a first surface of the bracket, and based on the driving unit applying the driving force to the bracket, the light-emitting surface of the light-emitting unit is changed in shape in conjunction with a change in shape of the bracket, wherein the driving unit comprises: an operating rod connected to a rear surface of the bracket; and a driving motor configured to drive the operating rod. an operating rod connected to a rear surface of the bracket; and a driving motor configured to drive the operating rod.