The invention discloses an open type partial discharge big data management system based on an intelligent diagnosis algorithm. The system comprises a data access module, a data conversion module, a database and a diagnosis analysis module, wherein the data access module is used for providing a standard data input interface to receive detection data; the data conversion module is used for carryingout protocol conversion on the data received by the data access module and normalizing the data to be in a data format required by a platform; the database comprises a data hierarchical storage module; the data hierarchical storage module comprises a basic database and an advanced database; and the diagnosis analysis module is connected with the database, and is used for judging a discharge diagnosis result of to-be-diagnosed data and training the intelligent diagnosis algorithm by utilizing an advanced data set in the advanced database. The intelligent diagnosis algorithm is trained and optimized, and data support is provided for diagnosis; open type data management enables a user to put the data and the diagnosis algorithm into the platform for verification; and due to the possession ofa multiple diagnosis mechanism, the reliability and accuracy of a diagnosis result are ensured.