An electrical transformer district lean management system is based on an asp.net platform and comprises a system setting module, a personnel management module, an index setting module, a detailed rule management module, a performance assessment module and an assessment querying module. Each module comprises data information adding, deleting and modifying functions and is expandable. The system starts with the basic electrical transformer district of a power supply enterprise and weak links of lowest agricultural power employee management, the management mode is created, electrical transformer district indexes and personnel performance management are tightly fused, personnel monthly and quarterly performance assessment is realized, the power supply enterprise is enabled to enhance the management of personnel and electrical transformer district equipment in base power supply stations, the working enthusiasm of the personnel is improved, the electrical transformer district management level is improved, the management level and the service image of the power supply enterprises are improved, the economic and social benefits are increased, the operation is simple, the practicability is high, and the popularization and application value is relatively high.