In　this　paper,　a　new　view　planning　algorithm　of　generating　3-D　models　automatically　is　presented.　It　is　realized　based　on　the　trend　surface　of　the　visual　field　and　limit　visual　region　of　the　vision　system.　The　candidate　next　best　view　(NBV)　position　is　obtained　by　computing　the　unknown　space　area　according　to　the　trend　surface　of　the　acquired　the　object　surface　information　and　limit　region　of　the　vision　system　between　viewing　points.　The　final　NBV　position,　which　acquired　maximum　the　unknown　space　area,　is　got　by　comparing　the　above　candidate　view　position.