Three-dimensional graphic processing system and method capable of utilizing camera preview images

Provided is a three-dimensional (3D) graphic processing system and method capable of utilizing camera preview images in which the camera preview images are stored in a texture memory and then the stored camera preview images are used as a texture in a 3D graphic processor. The camera preview images are stored in a texture memory and then the stored camera preview images are used as a texture in a 3D graphic processor, in a manner that an extended function can be supported through a mutual operation of a preview processor and a graphic processor. The camera preview is displayed on the moving polygonal plane to which a near-and-far sense is applied, or the camera image is used as a background texture to then enable 3D objects to be drawn on the background texture. As a result, games with real feeling can be developed in a manner that 3D contents can be realized using real images as a background.