Disclosed in the present invention are a method and device for onboarding a network service descriptor, the method comprising: receiving, by a master orchestrator, a cross-domain network service descriptor (NSD) onboard instruction from a sender; determining, by the master orchestrator and according to the cross-domain NSD onboard instruction, that a slave orchestrator needs to onboard an NSD corresponding to a management domain of the slave orchestrator; and transmitting, by the master orchestrator, an NSD onboard instruction to the slave orchestrator, the NSD onboard instruction being configured to instruct the slave orchestrator to onboard the NSD corresponding to the management domain of the slave orchestrator, wherein a management domain of the master orchestrator is different from the management domain of the slave orchestrator. The method or device in the present invention can be applied to an NS deployment across NFVO management domains, thereby ensuring consistency and reliability in an NSD onboarding process when deploying an NS across NFVO management domains.