This application provides a data management method and an apparatus, and relate to the field of data storage, to implement unified management of management data. The method includes: A management service function unit receives an association relationship configuration request, where the association relationship configuration request carries association information used to configure an association relationship between a first management function unit and a first management data function unit; receives a first query request, where the first query request carries instance information of the first management function unit or instance indication information of the first management function unit; determines instance information that is of the first management data function unit and that corresponds to the instance information of the first management function unit; or determines instance information that is of the first management data function unit and that corresponds to the instance indication information of the first management function unit.