The invention discloses a power grid equipment NQI big data system. The power grid equipment NQI big data system is characterized in that the power grid equipment NQI big data system comprises a dataaccess module which is used for the access of data related to the quality of power grid equipment, a data storage module which is used for storing accessed data related to the quality of the power grid equipment and providing basic services of distributed file storage, column table storage and distributed relational database storage, a data calculation module which is used for providing an offlineand real-time calculation platform framework and platform and providing a multi-dimensional analysis platform subjected to data verification, and a data service module which is used for packaging a data mart meeting various data services and application services, providing various interfaces and services for data access, thus solving the problem of integration and utilization of quality related data of power grid equipment.