Patent　roadmap　is　the　outstanding　method　for　technology　analysis,　which　can　clearly　describe　the　state　of　development　of　technology　based　on　the　concrete　patent　information.　This　paper　does　the　research　on　global　CNT-FED　technology　development　state　and　the　main　nations　situations　by　using　the　patent　management　map　that　is　one　branch　of　technology　roadmap,　and　hoping　that　the　analysis　and　prediction　of　the　fuzzy　emerging　technology　can　give　us　more　inspire　and　guidance　to　the　R&D　strategy　of　our　nation＇s　relevant　industry,　and　thus　expecting　that　we　can　occupy　one　seat　on　the　market　of　Flat　Panel　Display　in　the　future.