Automatic　reconstruction　of　3-D　object　has　attracted　much　attention　both　in　computer　vision　and　graphics　communities.　In　this　paper,　a　new　planning　approach　of　generating　3-D　model　automatically　is　proposed.　The　new　algorithm　incorporates　the　visual　region　of　the　Laser-vision　system　with　the　trend　surface　of　the　model　and　selects　the　suitability　of　viewpoints　as　the　NBV　on　scanning　coverage.　The　candidate　NBV　position　is　obtained　according　to　the　visual　region　of　the　system　based　on　the　trend　surface　model.　The　candidate　that　obtains　maximum　surface　area　is　selected　as　the　next-best-view　position.　Experimental　results　show　that　the　method　is　effective　in　practical　implementation.