Abstract: With the emergence and deepening of GIS cloud concept, after the client/server structure (C/S) and browser/server structure (B/S), this paper presents a new generation software architecture named T-C-V (terminal-cloud-virtual), which is suitable for cloud computing and cloud service, and elaborates its basic concept, general structure and core technologies. In this structure, V-tier based on the virtualization software and hardware equipment in bottom tier, shielding different structural characteristics among different computers, different networks, different storage devices, provides a unified and efficient operating environment for the upper tier; C-tier is a framework for massive GIS data, service and resource management and service system; T-tier faced to the information users such as the government, business, the public et al., provides standard visiting interface and builds all kinds of terminal applications. In a word, T-C-V structure will change geographic information service model, calculation model and business model, which can create an environment for better interaction and more transparent creation of public and enterprise applications.