The present disclosure discloses a three-dimensional display system, comprising a display device and a barrier located at the light emergent side of the display device. Addition of the distance adjusting structure, which adjusts the viewing distance of the three-dimensional display system by adjusting the distance between the display device and the barrier, between the display device and the barrier allows the three-dimensional display system free from limitation of a fixed viewing distance, thus resulting in a stronger spatially adapting capability and a broader application scope thereof.