This paper proposed a novel 3D surface reconstruction method with posterior constraints of edge detection applying to general digital camera. The intrinsic parameters are calibrated with Zhang calibration method. After matching the images taken at two different orientations, the fundamental matrix and corresponding motion parameters by two different orientations are estimated, selecting optical center coordinate system of left camera as world coordinate system, and the projection matrix corresponding the two orientations is obtained. At last, the 3D coordinates of object feature point is computed and object surface is displayed with VRML technology. This system is simple, in addition, the proposed method is suit for general digital camera.