The present invention discloses an energy saving state method, a management server, and a network device. The method includes: determining, by an NFVO, a current value of an energy efficiency status parameter of a first NF, where the energy efficiency status parameter is a parameter configured for the first NF; and sending, by the NFVO, first indication information to a management node of a first resource, where the first indication information includes the current value, and is used to instruct the management node to set an energy saving state of the first resource as an energy saving state indicated by the current value, and the first resource is a resource for implementing the first NF. In embodiments of the present invention, an energy saving state of the first NF and the energy saving state of the first resource for implementing the first NF are adjusted to be consistent by transferring an energy efficiency status parameter value of the first NF between the NFVO and the resource management node, thereby resolving a problem of difficult coordinated control between an NF and a resource for implementing the NF during energy-saving control in the NFV field.