A method for managing a resource object in a software-defined networking, SDN, system, wherein the SDN system comprises a management system, an application system, and a control system; the control system uses a universally unique identifier, UUID, to identify a resource object; and the method comprises: obtaining, by the management system, a UUID of a newly discovered resource object; generating, by the management system, a corresponding full distinguished name, FDN, identifier for the newly discovered resource object; adding, by the management system, a mapping relationship between the UUID of the newly discovered resource object and the FDN identifier of the newly discovered resource object to a resource object identifier mapping relationship table, wherein a mapping relationship between a UUID of the resource object and an FDN identifier of the resource object is stored in the resource object identifier mapping relationship table, wherein the management system further adds basic information of the newly discovered resource object to the mapping relationship between the UUID of the newly discovered resource object and the FDN identifier of the newly discovered resource object to generate a mapping relationship between the basic information of the newly discovered resource object, the UUID identifier of the newly discovered resource object, and the FDN identifier of the newly discovered resource object; receiving, by the management system, a first query request for a to-be-managed resource object that is sent by the application system, wherein the first query request comprises basic information of the to-be-managed resource object, and the first query request is used to obtain an FDN identifier of the to-be-managed resource object; obtaining, by the management system, the FDN identifier of the to-be-managed resource object according to the basic information of the to-be-managed resource object; and returning, by the management system, the FDN identifier of the to-be-managed resource object to the application system. obtaining, by the management system, a UUID of a newly discovered resource object; generating, by the management system, a corresponding full distinguished name, FDN, identifier for the newly discovered resource object; adding, by the management system, a mapping relationship between the UUID of the newly discovered resource object and the FDN identifier of the newly discovered resource object to a resource object identifier mapping relationship table, wherein a mapping relationship between a UUID of the resource object and an FDN identifier of the resource object is stored in the resource object identifier mapping relationship table, wherein the management system further adds basic information of the newly discovered resource object to the mapping relationship between the UUID of the newly discovered resource object and the FDN identifier of the newly discovered resource object to generate a mapping relationship between the basic information of the newly discovered resource object, the UUID identifier of the newly discovered resource object, and the FDN identifier of the newly discovered resource object; receiving, by the management system, a first query request for a to-be-managed resource object that is sent by the application system, wherein the first query request comprises basic information of the to-be-managed resource object, and the first query request is used to obtain an FDN identifier of the to-be-managed resource object; obtaining, by the management system, the FDN identifier of the to-be-managed resource object according to the basic information of the to-be-managed resource object; and returning, by the management system, the FDN identifier of the to-be-managed resource object to the application system.