Abstract: A color-changeable lamp includes a base, a control unit, a deformable lamp body, a color-sensing unit, a pressure-sensing unit and a light-emitting unit. The deformable lamp body is connected with the base and has a closed space. The control unit, the color-sensing unit and the light-emitting unit are disposed at the base. The pressure-sensing unit is disposed in the closed space. The color-sensing unit can sense a color of a target and generate a color signal corresponding to the color of the target, and the pressure-sensing unit can sense the air pressure in the closed space and send a pressure signal to the control unit when the deformable lamp body is deformed. When the pressure signal reaches a predetermined value, the control unit controls the light-emitting unit to emit the light corresponding to the color signal according to the color signal.