A visual
interfacing apparatus for providing mixed multiple stereo images is provided. The visual
interfacing apparatus includes: an
external image processor receiving the actual image of the object and the external stereo images, dividing the received image into left / right viewing images, and outputting the left / right images; a viewing information extractor tracking a user's
eye position, eye orientation, direction, and focal distance; an image creator creating predetermined 3D graphic
stereo image information that is displayed to the user along with the images received by the
external image processor as a mono image or a
stereo image by left / right viewing, and outputting image information corresponding to each of the left / right viewing images according to the user's viewing information extracted by the viewing information extractor; and a
stereo image processor combining the left / right image information received by the
external image processor and the image creator based on the user's viewing information extracted by the viewing information extractor in 3D spatial coordinate space, and providing a user's view with combined multiple stereo images. Accordingly, the visual
interfacing apparatus combines information of an external common stereo image apparatus and an internal personal stereo image apparatus, thereby overcoming a problem that a user can only use a single stereo image visualizing apparatus.