A　fuzzy　matter-element　model,　combined　with　the　entropy　weight　of　an　index,　has　been　used　as　an　evaluation　method　to　achieve　a　comprehensive　assessment　and　analysis　of　the　operational　efficiency　of　wastewater　treatment　plants　(WWTPs).　The　feasibility　of　the　method　had　been　validated　based　on　actual　operational　data　and　instance　from　eight　WWTPs　located　in　a　city　in　Northern　China.　According　to　the　results　of　the　comprehensive　evaluation,　the　operational　efficiency　of　the　WWTP　using　an　anaerobic/anoxic/oxic　process　was　generally　better　than　other　wastewater　treating　technologies.　And　especially,　the　removal　efficiencies　of　nitrogen　and　phosphorus　pollutants　were　much　higher　for　the　process,　which　suits　well　the　actual　operational　situation　of　Chinese　WWTPs.　Total　nitrogen　(TN)　removal　rate　and　the　productive　quantity　of　the　excess　sludge　cake　were　identified　as　important　factors　in　the　evaluation　of　the　operational　efficiency　for　a　WWTP.　So　the　operation　level　of　WWTP　could　be　improved　by　increasing　the　TN　removal　rate　and　decreasing　the　excess　sludge　cake　quantity.　The　developed　method　can　evaluate　and　analyze　the　operational　efficiency　scientifically　and　objectively,　and　the　evaluation　results　can　be　used　to　guide　the　construction,　operation　and　management　of　WWTPs　in　The　Three　Gorge　reservoir　district　of　China.