A common service resource application method performed by a common service resource application apparatus and being applied to a network functions virtualization, NFV, network, wherein the common service resource application apparatus comprises a common service manager, CSM, unit, a virtualized infrastructure manager, VIM, unit, a Virtual Network Function Manager, VNFM, unit, and a Network Functions Virtualization Orchestrator, NFVO, unit, wherein the method comprises the steps of: • in a first alternative: o sending, by the VNFM unit, to the CSM unit by using an interface between the CSM unit and the VNFM unit, a resource requirement information of a common service required by a VNF (S 1031), o receiving, by the CSM unit, from the VNFM unit by using the interface between the CSM unit and the VNFM unit, the resource requirement information of the common service required by the VNF (S 1031); • in a second alternative instead of the first alternative: o sending, by the VNFM unit, to the NFVO unit, the resource requirement information of the common service required by the VNF (S 1032), o sending, by the NFVO unit, to the CSM unit by using an interface between the CSM unit and the NFVO unit, the resource requirement information of the common service required by the VNF (S 1033), and • sending, by the CSM unit based on the resource requirement information of the common service required by the VNF, a request for allocating a resource required by the common service required by the VNF to the VIM unit, and allocate, by the VIM unit, the resource to the common service (S 1041), wherein before the sending, by the CSM unit, based on the resource requirement information of the common service, the VIM unit to allocate the resource required by the common service of the VNF, the method further comprises: requesting, by the CSM unit, based on the resource requirement information of the common service, the VIM unit to reserve the resource required by the common service of the VNF. • in a first alternative: o sending, by the VNFM unit, to the CSM unit by using an interface between the CSM unit and the VNFM unit, a resource requirement information of a common service required by a VNF (S 1031), o receiving, by the CSM unit, from the VNFM unit by using the interface between the CSM unit and the VNFM unit, the resource requirement information of the common service required by the VNF (S 1031); o sending, by the VNFM unit, to the CSM unit by using an interface between the CSM unit and the VNFM unit, a resource requirement information of a common service required by a VNF (S 1031), o receiving, by the CSM unit, from the VNFM unit by using the interface between the CSM unit and the VNFM unit, the resource requirement information of the common service required by the VNF (S 1031); • in a second alternative instead of the first alternative: o sending, by the VNFM unit, to the NFVO unit, the resource requirement information of the common service required by the VNF (S 1032), o sending, by the NFVO unit, to the CSM unit by using an interface between the CSM unit and the NFVO unit, the resource requirement information of the common service required by the VNF (S 1033), and o sending, by the VNFM unit, to the NFVO unit, the resource requirement information of the common service required by the VNF (S 1032), o sending, by the NFVO unit, to the CSM unit by using an interface between the CSM unit and the NFVO unit, the resource requirement information of the common service required by the VNF (S 1033), and • sending, by the CSM unit based on the resource requirement information of the common service required by the VNF, a request for allocating a resource required by the common service required by the VNF to the VIM unit, and allocate, by the VIM unit, the resource to the common service (S 1041), <EOS>