Since　the　regional　technology　innovation　system　is　an　open　system　that　is　away　from　equilibrium,　nonlinear,　layered　and　fluctuant,　and　has　the　characters　of　ecosystem,　we　will　regard　the　technology　innovation　system　as　a　technology　innovation　ecosystem.　Based　on　the　concept　of　regional　technology　innovation　ecosystem　(RTIE),　we　set　up　the　evaluation　indicator　system　to　analysis　the　performance　of　input　and　output　of　technology　innovation　in　30　Chinese　regions　by　using　Projection-Pursuit　model.　As　a　result　of　the　statistical　technology＇s　overcoming　the　impact　of　abnormal　points,　we　get　better　evaluation　conclusion.　So　it　is　a　reasonable　method　for　Projection-Pursuit　model　to　evaluate　the　regional　technology　innovation　ecosystem　performance.