The invention provides a management and control system for supervising power grid work and a management and control method thereof and relates to the field of power grid supporting facilities. The management and control system for supervising power grid work and the management and control method thereof are well-organized, logical, orderly and highly-stable, can effectively supervise and manage workers in practical construction after being used and thus can effectively improve operation standards and operation efficiency. A business sole-duty module is used for importing, adding and viewing work tasks and used for work task safety reporting; a safety supervisor module is used for viewing work tasks, viewing work task safety reports, adding work task assessing information, adding work task supervision information, viewing risk pre-warning information, viewing risk pre-warning handling records, adding risk pre-warning assessing information, and adding risk pre-warning supervision information. The system and the method are well-organized, logical, orderly and highly-stable.