Abstract: The strong and smart grid is the material base for State Grid Corporation of China（SGCC） to achieve high-quality development of power grid. With the change of internal and external situations, the existing technical standard system for smart grid has been unable to meet the needs of standardization work in the new era. Optimization and improvement of the standard system must be carried out. The research status of standard system for smart grid is sorted out by domestic enterprises, alliances,international standard organization and major foreign countries. New hierarchical architecture and conceptual model of smart grid standard system are designed in accordance with the principles of inheritance, innovation and practicability. The overall framework of the new smart grid standard system is constructed, the demand analysis of standardization is conducted in eight professional directions including integration and planning, smart power generation, ultra-high voltage（UHV） power transmission and transformation, smart power distribution, smart power utilization, dispatching control and electricity trading, information and communication, common supporting technologies. Finally, the key action plan of various professional directions is put forward according to the principle of importance, urgency and relevance.