A display system including a display device and a light combining device is provided. The display device includes a first display region and a second display region. The light combining device has a first surface and a second surface opposite to the first surface. The first surface is capable of reflecting a first light beam from the first display region to an observing region for forming a first virtual image. The second surface is capable of reflecting a second light beam from the second display region to the observing region for forming a second virtual image. A curvature of the first surface is different from a curvature of the second surface, and a position of the first virtual image is different from a position of the second virtual image.