The invention aims to provide a power grid object level authority configuration and inheritance method which can flexibly configure and automatically inherit power grid object level authority and greatly improve the data processing efficiency. The method comprises the following four steps: building an object ID tree, building an authority configuration table, adding and deleting authority, and authorizing access. The method is adopted to control power grid object level authority, and can flexibly configure authority to each level without changing design or memory structures; an automatic inheritance characteristic of level authority enables the work of authority configuration to be simplified to be minimum, thereby greatly improving the usability and operational efficiency of a system. Moreover, the method can be used for authority control on data and views of HSDA (High Speed Data Access), TSDA (Time Sequence Data Access) and GES (Generic Eventing and Subscription) interfaces, and improves the safety of data access to a great extent.