1. A three-dimensional digital magnifier magnifying real operation support system, for regenerating a visual field state the same with a situation in which an operator visually recognizes a subject by naked-eyes or optical magnifier, the system comprises: a three-dimensional digital magnifier, comprising: a pair of binocular vision image display device, arranged on the gaze of two eyes of the operator, as the minimum constitution; stereo arranged camera, installed from a position corresponding to central parts of pupils of the eyes behind the image display device, toward the visual field; surface polygon model 2, obtained by stereo measurements of a stereo method using left and right images of the three-dimensional digital magnifier; surface polygon model 1 of each constitution component established, in advance, from two-dimensional slice data of operation object or organism obtained by tomography; wherein: surface polygon model, in the surface polygon model 2 in front visual field image of the three-dimensional digital magnifier, having a three-dimensional shape similar to the surface polygon model 1, is detected by shape pattern recognition, and is then overlaid with the surface polygon model 1; virtual three-dimensional volume model computer graphics mapping internal constitution component texture within the surface polygon model 1 is tracked, in order to overlay partial or whole subject or organism serving as the operation subject in the visual field of the operator in three-dimensional digital magnifier by three-dimensional volume model computer graphics, invisible area of internal structure of an object displayed on the three-dimensional digital magnifier is displayed by pixels of internal constitution components of virtual three-dimensional volume model computer graphics, and the three-dimensional volume model computer graphics image is displayed real-time and changes its layout according to relative three-dimensional position changes of the camera and the object in the image shooting space, simulation relating to state change of subject in a real space presents state of three-dimensional computer graphics overlaid with the subject, and indirect impacts to three-dimensional computer graphics caused by changes of the image shooting space.