Currently, many hybrid satellite-aerial-terrestrial networks are under construction. The problem is how to coordinate heterogeneous communication networks and platforms to provide more effective services, which is seriously hindering the further development of networks. To mitigate this and other problems, a novel heterogeneous wireless network architecture named the Smart Identifier for Space and Terrestrial Integrated Network (SI-STIN) is designed. Based on the Smart Identifier Network (SINET), SI-STIN aims to solve the problem of the heterogeneous convergence of the integrated network layer, break through the triple binding of the traditional network layer design, and ultimately achieve high efficiency for resource integration and interconnection. The SI-STIN includes three layers and two domains: the smart pervasive service layer, dynamic resource adaption layer, and collaborative network component layer, and the entity domain and behavior domain, in which many separate identifiers and behavior descriptions are applied. Then the details, workflow, applications, and challenges of the STIN are presented. Experimental analysis verifies that the SI-STIN improves the performance in regard to network security and transmission efficiency and thus has great potential to satisfy various network demands.