Abstract: Prolonglifespanofgeosynchronousorbit（GEO）satellitesbyrefuelingsatellitesonorbithaseconomicvalue.Asaresult,itisveryimportanttoassesstheon-orbitservicing（OOS）paradigmandoptimizeitsutilities.TheassessmentofOOSsystemforrefuelinggeosynchronoussatellitesandoptimizationmethodsofitsdeploymentstrategywerestudied.AnewarchitectureofOOSsystemwasproposed，whichincludedafuelstoragestationandNrefuelingspacecraft（1+N）.Thefuelstoragestationcarriedagreatdealoffuel，runningonorbitsteadily.TherefuelingspacecraftmaneuveredongeosynchronousorbitandimplementedtherefuelingmissionforGEOsatellites，whenthespacecraftransoutoffuel，itcametothestationandacquiredfuel.Theweightandorbitoffuelstoragestation，thenumber，weightandorbitofrefuelingspacecraftwerethekeyproblemsofdeploymentstrategy.ThemathematicmodelofoptimizationofthedeploymentstrategywhichshortentheresponsetimeofrefuelingGEOsatellitesandlowerthepriceofservicingsystemasmulti-objectiveswasconstructed.Thecalculationprocessoftheoptimizationwasanalyzed.Byanalyzingtheoptimizationresults，theoptimaldeploymentstrategyofservicingsystemcontainingafuelstoragestationand4-6refuelingspacecraftusedforrefuelingGEOsatelliteswasproposed.

Key words: geosynchronoussatellites, onorbitrefueling, storagestation, refuelingspacecraft, deploymentstrategy, optimization