The　study　of　the　regional　technology　innovation　ecosystem　(RTIE)　derives　from　the　revelation　on　the　natural　ecological　system.　This　paper,　proceeding　from　the　basic　thinking　of　the　entropy　theory,　discusses　the　idea　of　entropy　of　RTIE　and　advances　the　concept　of　performance　entropy　with　the　analysis　of　the　structure　of　performance　entropy　flow　and　the　structures　of　performance　entropy.　And　based　on　the　soft　thinking　methodology　(SSM),　we　build　up　the　indicator　system　for　the　evaluation　of　regional　technology　innovation　performance,　and　then　the　computation　of　performance　entropy　of　the　technology　innovation　ecosystem　in　terms　of　administrative　region　is　provided　through　the　building　of　relevant　models　(Entropy　analysis　and　Factor　analysis).　Finally　we　use　Rank　Correlation　method　to　verify　the　degree　of　relationship　between　the　two　evaluation　methods.