Embodiments of the present invention provide a three-dimensional image displaying system, method, and apparatus, which integrates a displayed three-dimensional image with an environment and relieves visual fatigue when an observer watches a three-dimensional image. The system includes: a drive controller, configured to display a slice image of a stereoscopic object on the display panel according to a set sequence; and when the slice image is displayed on the display panel, control, according to a depth of the slice image in the stereoscopic object, refraction intensity of a refraction variable part for a light ray projected by the display panel, where time required for successively displaying all slice images, which are of the stereoscopic object to be imaged and are perpendicular to one visual axis, on the display panel at a time according to the set sequence is less than time of persistence of vision; the display panel, configured to display the slice image under control of the drive controller; and the len
