Currently, power grid construction has great demand for electric power material quantity and high demand for its quality, and to ensure the safety and reliability of grid materials and to realize the material intensive management has become the key link of the power grid construction. How to evaluate and manage the electric purchasing material supplier in scientific, reasonable, fair and equitable way? How to improve value creation ability of the supply and how to manage the peformance of the power industry? How to build a comprehensive power supplies quality monitoring management system with big data technology? This paper will discuss the above aspects.