A communication network system includes a resource network element and further includes a resource server adapted to retrieve availability information of the resource network element and to allocate the resource network element according to the retrieved availability information. A service processing method in a communication network at the resource server side includes: receiving a resource query request; and searching for an available resource network element and responding with it being a response result. A service processing method in a communication network at the resource network element side includes: receiving a request for a service; determining whether the service can be processed immediately, and if not, transmitting a resource query request to a resource server; and transmitting the service request to an available resource network element in a response result. A resource server and a resource network element are further disclosed. With a resource server, the invention can monitor dynamically availability information of a resource network element and allocate appropriately an idle resource network element to thereby improve both a utilization ratio of network resource and a service processing capability of network element.