Human-Computer　Interaction　(HCI)　refers　to　a　technology　which　explores　the　interaction　and　intercommunication　between　human　beings　and　computer,　and　somatosensory　interaction　is　precisely　a　HCI　technology　which　came　into　vogue　during　the　past　one　or　two　years.　In　order　to　obtain　a　more　friendly　interaction　experience,　this　paper,using　Kinect　launched　by　Microsoft,　develops　the　actions　related　to　somatosensory　interaction　and　the　approaches　for　achieving　action　recognition.　Experimental　results　demonstrated　that　real-time　navigation　and　auto　navigation　are　available　under　3D　virtual　environments　for　the　somatosensory　interaction　actions　involved　in　this　paper.　©　2012　IEEE.