In recent years, the power industry is committed to clean and low-carbon transformation and development, continues to increase investment in research and development, and innovation capacity has been significantly enhanced, which has strongly supported national energy security and protection. The digital and intelligent upgrading of the industry has become an inevitable trend for the future development of the electric power industry. This paper starts from the grid science and technology innovation index system under the smart grid, based on the improved TrustRank-ISM model to study the conduction relationship and correlation between science and technology innovation indexes, and better explores the relationship between science and technology innovation and smart grid construction from specific indexes, which is conducive to the grid to further improve the science and technology innovation index system and increase the application of key core technologies, to promote the smart grid construction and This will contribute to the low-carbon and green development of energy.