Present service management models can not satisfy the emerging requirements along with the fast NGN services’ development.This paper presents a novel universal NGN service management model-USMM

which is independent of network layer aiming at network independent service layer management.NGN service management function domain is analyzed based on multi-level and multi-dimension mode which makes it easy to extend and deepen.Then a uniform service management objects description based on UML is presented

including service management processes

service management shared information/data

service management features and service management relationship.The objects description works as a meta-model to guide the development of NGN service management system.Through the comparison with other four service management models

the value of USMM is demonstrated.