Abstract: There is provided a flat panel display using a micro-electromechanical device, comprising a back glass substrate having a transparent electrode of a transparent electric conductor; a front glass substrate having a color filter layer; an micro-electromechanical device formed at the transparent electrode to switch light; and a support beam for supporting the back glass substrate and the front glass substrate. The micro-electromechanical device used in the flat panel display is fabricated by a micro-machining technology, thereby increasing a light utilizing efficiency and remarkably reducing a fabricating cost.