A liquid crystal lens display device, which includes a backlight module and a liquid crystal structure. The liquid crystal structure includes a liquid crystal layer, a quantum dot layer, and a light shield structure. The liquid crystal layer defines multiple display pixels, and each display pixel may be switchable between an on state and an off state. The light shield structure includes two shield layers, each having multiple openings and multiple shield portions alternatively positioned. When the display pixel is in the on state, the liquid crystal molecules form at least one liquid crystal lens to refract the light beams, and the refracted light beams penetrate through the openings of the light shield structure to reach the quantum dot layer. When the display pixel is in the off state, the light beams will not be refracted, and will thus be blocked by the light shield structure.