Information and communication technology is the core part of power grid operation and the key technology for the development of intelligent power grid. Electric power system is the basic demand of national development and construction and occupies an important position in people's life. Smart grid is to update the original power grid system, take the traditional power grid as the foundation, combine the most advanced information and communication technology, and finally form an intelligent power grid system. This paper will analyze the information and communication technology in the construction of intelligent power grid to understand the existence of information and communication technology in the practical application of smart power grid in China.