In　this　paper,　GML　and　SVC　are　discussed　firstly,　especially　in　the　role　of　open　WebGIS.　Then　an　open　WebGIS　framework　is　put　forward　that　using　GML　to　store　and　integrate　geographic　spatial　data　and　using　SVC　to　implement　web　display　and　operation　for　geographic　spatial　data.　In　the　end,　taking　a　forestry　data　as　an　example,　an　open　WebGIS　application　system　was　set　up　and　discussed.