Dispatching being the core of the power operation and control, intelligent dispatching is the key point of the construction of unified and strong smart grid. During the construction of smart grid dispatching technical support system, many key points and difficulties must be addressed including massive data storage and processing, huge computational applications of security and stability assessment, unified management and flexible expansion of the system, flexible deployment and dispatching operations, integration of calculation and analysis capabilities. Based on the relevant characteristics of cloud computation, there latest technologies using cloud computation and the optimization of platform in constructing smart grid dispatching technical support system were discussed.