A liquid crystal displaying device has an exterior housing. The liquid crystal displaying device comprises a liquid crystal displaying unit and a backlight unit. The liquid crystal displaying unit includes a frame, a liquid crystal displaying panel and a driving control circuit. The frame is arranged around the periphery of the liquid crystal displaying panel. The liquid crystal displaying panel has a displaying side. The driving control circuit is set inside the frame and is electrically connected to the liquid crystal displaying panel. The backlight unit includes a shell, at least one light-emitting element, and a power driver for driving the light-emitting element. The light-emitting element and the power driver are installed inside the shell, while the shell is assembled with the frame, such that the backlight unit is positioned at the side opposite to the displaying side of the liquid crystal displaying panel. The shell of the backlight unit and the frame of the liquid crystal displaying unit form the exterior housing of the liquid crystal displaying device.