The present invention relates to a binocular three-dimensional graphic rendering method and a related system. The method comprises a projection transformation step. The projection transformation step comprises: adding a middle plane between a near plane and a far plane as a projection plane, and projecting primitives between the near plane and the far plane onto the middle plane. The primitives between the near plane and the far plane are projected onto the middle plane through the added middle plane, so the primitives between the near plane and the middle plane achieve a stereo effect of out of the screen, and the primitives between the middle plane and the far plane achieve a stereo effect of into the screen. Therefore, no specific hardware is required for rendering the effects of "out of the screen" and "into the screen" when the existing rendering pipelines are used in a 3D display device.