Abstract: Due to energy depletion and climate change,a new energy revolution is happening,which mainly focuses on the development of renewable energy and new types of energy.Under this basic environment of energy development,the power grid undertakes the new mission to be a comprehensive service platform of energy,electricity and information excepting the traditional task of electricity transmission.The visions of power grid pattern of China in 2050 and suitable key electrical technologies affecting the visions of grid are described in this paper.A macro prediction method based on key performance indices of key issues is proposed and used to forecast the two stages of China’s power grid pattern in mid-term（2011-2030） and long-term（2031-2050） development.Then 10 key technologies are proposed and basic scientific problems and cutting-edge technologies among them are sorted out.