This application provides a method for managing a service in an NFV architecture, and an apparatus. The method includes: generating, by a first network element after receiving a network function virtualization NFV resource change notification sent by a virtualized infrastructure manager VIM, first constraint information used to modify NFVI software and/or hardware; and sending, by the first network element, a first notification message to the VIM, where the first notification message carries the first constraint information, and the first constraint information is used by the VIM to modify NFVI software and/or hardware based on the first constraint information. In embodiments of this application, when an NFV resource is to change, the first network element sends, to the VIM, constraint information used to modify NFVI software and/or hardware, to avoid a problem that a service is affected because the VIM directly migrates the service, ensure normal running of the service, and improve user experience.