Abstract: In view of problem of limitation on description and drawing of 3D graph by SVG, the paper proposed a 3D implementing method of SVG. It introduced conversion principle of 2D coordinate to 3D coordinate of SVG in details, gave processes of drawing and operation control of SVG-3D graph on 3D coordinate. Taking drawing a cube and a spherosome in 3D scene as example, it expounded implementation of creation of 3D scene and drawing and operation control of the two graphs in HTML page by use of JavaScript.