Disclosed in the present application are a network-function (NF) management method and NF management device, used for centralized management of discovery and access between NF components and conducive to the normal operation of a network. The method of the embodiments of the present invention comprises: receiving an NF discovery request sent by a first NF component, said NF discovery request containing a second NF identifier, said second NF identifier being used for representing a second NF; according to the second NF identifier, obtaining component information of a second NF component, said second NF component having a second NF and said component information containing a discovery policy of the second NF component as well as a second NF component identifier; according to the discovery policy in the component information, determining whether the first NF component may access the second NF component; if it may, then sending the second NF component identifier to the first NF component.