The chief technical characteristics of the supporting system for smart grid control center include: wide area, panorama, distribution, integration, sensitivity, foresight and risk defense. The essential element in real-time monitor, control and early warning is to realize early warning and preventive control. The dispatch planning is to realize unified, coordinated and refined plan compilation and its close loop safety check at different levels, with multiple targets, multiple obligations, and multiple periodes. The dispatch management shall focus on enhancing flexibility, standardize business flow and integration of different levels coordination . This paper first presents the general system design, compared it with current technical support means to introduce the system framework and key features. In the end, several key technical issues are discussed and described with the application prospects.