Aimed at improving poor performance of current network routing service in the way of scalability, a new scalable routing service model (SRSM) is proposed based on the core of network interconnection and principles of modern packet switching. Three basic elements, which are addressing mode, routing table and routing algorithm, are abstracted to establish Meta model (SRSM) of routing service and realize typification of routing service models. Thus enhancing the abstraction level of routing service model can make it more flexible and scalable. Furthermore, the scalability of SRSM is resolving through contrasting routing service model instances of IP network, CDN (Content Delivery Network) and NDN (Named Data Networking). Finally, the related experiments of named routing service model instances and IP routing service model instances based on SRSM are provided to verify the feasibility and scalability of SRSM.