Abstract: A 3D graphic method which reverses to acquire its prototype from the images is studied.Perspective space which is based on SolidWorks,imports the prototype photos,by setting the image contour key points for the perspective of the vanishing point,thus it builds up the geometric relation,and then establishes the line of sight and image and reverses out the prototype.3D graphic method is more intuitive and efficient than 2D one;the deductive method of "stroke" will simplify a more professional graphic method and turns it into a common stroke operation.

Key words: industrial design, image reverse, 3D graphic method, perspective