With remote browser and source maintenance being put forward, G and SVG language come into being, to achieve the consistency of share between master station and sub-station. By comparison and analysis of SVG and G language format graphics files, a graphic conversion method is proposed, which contains import and export for SVG and G. In addition, schematic refresh and mapping point table is introduced. Proven by lots of practice, the G and SVG files can meet requirements fully for master station graphic system, achieving the goal of station-side maintenance and the whole network to share.