The primary problem during the evolvement of next-generation Intet is the contradiction between growing requirements for Intet and the insufficient development of network theory and technology. As the fundamental principles to guide the developing direction of Intet, the study of Intet architecture is always a focus in the research community. To address the core issue of network scalability, we propose multi-dimension scalable architecture of next-generation Intet, the main idea of which is to extend the single-dimension scalability of traditional Intet on interconnection to multi-dimension scalability of next-generation Intet. The multi-dimension scalability is composed of scale-scalability,performance-scalability, security-scalability, function-scalability, and service-scalability. We suggest five elements, namely,IPv6, authentic IPv6 addressing, scalable processing capacity of routers, end-to-end connectionless Quality-of-Service control,and 4over6 mechanism to realize the multi-dimension scalability. The current research results show that the multi-dimension scalable architecture composed of these five elements will bring great influence on next-generation Intet.