简介：Withrespecttothedecisionmakingproblemswherealotoffuzzyandgreyinformationalwaysexistsinthereal-lifedecisionmakinginformationsystem,itisdifficultforsuchuncertaintymethodsasfuzzymathematics,probability,andintervalnumberstodealwith.Tothisend,basedonthethoughtandmethodofgreynumbers,greydegreesandintervalnumbers,theconceptofdominancegreydegreeisdefined.Andthenamethodofrankingintervalgreynumbersbasedonthedominancegreydegreeisproposed.Afterdiscussingtherelevantproperties,thepaperfinallyusesanexampletodemonstratetheeffectivenessandapplicabilityofthemodel.Theresultshowsthattheproposedmodelcanmoreaccuratelydescribeuncertaintydecisionmakingproblems,andrealizethetotalorderingprocessformultiple-attributedecision-makingproblems.