Abstract: HEPS (High Energy Photon Source) is a planned ultra-bright and extremely low emittance synchrotron light source which will contain about 2500 magnets.The design of magnet database system includes conceptual and functional design of database, database establishment, web-based management platform design and development.The magnet related data including design, measurements, tests, and operation are typically scattered in various storages which is hard to access for high-level purposes.For such a large number of magnets, it is very important to have essential magnet information systematically stored in relational databases for efficient management and applications.This database is developed with MySQL.To provide a better view and access function of magnet related data, a web-based management platform has been developed for data uploading, querying and managing.This system is of great significance to the installation, operation and maintenance of magnet equipment and the overall equipment information management of HEPS.