The invention provides a display device and a display method. The display device comprises a display curtain, a projection machine and a control mechanism, wherein the display curtain comprises at least two sub-display areas, each sub-display area can be independently driven so that each sub-display area can be switched between a scattering state and a transparent state; the projection machine is used for projecting an image on the display curtain; and the control mechanism is used for synchronously driving the projection machine and the display curtain to control at least a part of the sub-display areas to be switched in the scattering state or the transparent state respectively according to the projected image of the projection machine. According to the display device provided by the invention, the display curtain of the display device can realize that a part of the sub-display areas are in the scattering state so as to realize projection display and a part of the subs-display areas are in the transparent state, so that actual scenes are watched, the illusion of vitality and reality combined display in the air is realized, and more abundant stage or display effect is realized.