The　panel　data　of　31　countries　and　regions＇　R&D　intensity　(R&D/GDP).　GDP　per　Capita　in　1995-2006　and　fixed-effect　variable　coefficient　model　are　applied　to　analyze　the　contribution　of　R&D　investment　to　economic　growth.　Through　the　relevant　data　analyses,　some　basics　on　various　countries　and　regions　R&D　investment　and　their　economic　growth　can　be　acquired,　and　it　also　gives　some　guides　for　Chinese　R&D　investment.