Fuzzy　DEMATEL　method　is　diffusely　employed　to　analyze　the　interrelationship　among　factors　in　various　fields　under　uncertain　and　fuzzy　environment.　In　the　extant　fuzzy　DEMATEL　studies,　fuzzy　assessments　are　converted　into　related　crisp　values　by　means　of　different　defuzzification　ways.　Such　conversion　may　result　in　not　only　the　loss　of　information,　but　also　the　discount　of　consideration　of　fuzzy　information.　Therefore,　it　seems　reasonable　and　necessary　to　keep　as　much　information　as　possible　during　the　analysis　process,　instead　of　converting　it　into　crisp　values　at　the　very　beginning.　An　appropriate　way　to　keep　as　much　information　as　possible　is　to　employ　alpha　level　sets　to　handle　fuzzy　information　instead　of　simple　defuzzification.　In　addition,　it　is　quite　common　that　experts　may　hesitate　under　uncertain　and　fuzzy　environment　in　the　real-world　situation,　when　providing　their　assessments　on　the　interrelationship　among　factors.　However,　such　practical　issue　is　neglected　in　the　extant　fuzzy　DEMATEL　methods.　With　respect　to　aforementioned　limitations,　this　study　proposes　a　novel　alpha　level　sets　based　fuzzy　DEMATEL　method　to　handle　the　fuzzy　information,　together　with　considering　experts＇　hesitation　from　qualitative　context　under　uncertain　and　fuzzy　environment.　Additionally,　two　different　options　are　provided　to　analyze　the　interrelationship　among　factors　in　the　proposed　method.　The　proposed　method　not　only　improves　the　extant　fuzzy　DEMATEL　studies,　but　also　enriches　the　theoretical　studies　of　fuzzy　DEMATEL,　its　novelty　and　superiority　is　demonstrated　through　illustrative　example　and　related　comparisons.