Skeleton-based　approaches　are　a　prevalent　method　for　creating　a　3D　model　from　a　contour　sketch.　But　to　date,　most　3D　models　are　created　from　simply-connected　polygon　(simple　closed　contours),　so　these　3D　models　are　normally　blobby　shapes.　In　this　paper,　we　present　a　novel　3D　free-form　modeling　method　from　multiply-connected　polygon　(polygon　with　holes).　First,　we　use　polygon　approximation　to　reduce　the　complexity　of　a　contour　sketch　to　a　polygon.　Next,　the　approximated　skeleton　of　multiply-connected　polygon　was　extracted　based　on　a　Delaunay　triangulation　algorithm　for　arbitrary　polygons.　Then,　we　generate　some　contour　points　on　the　right　side　and　left　side　of　the　skeleton　node　and　elevate　each　contour　point　according　to　their　distance　from　the　contour.　Finally,　we　create　a　3D　modeling　with　holes.　At　the　end　of　this　paper,　we　demonstrate　our　results　by　using　OpenGL　API　to　visualize　the　3D　surface　from　triangular　mesh.