The invention discloses an active close-loop monitoring information source end maintenance method. The active close-loop monitoring information source end maintenance method includes automatically synchronizing a monitoring information maintenance plan to a regulation system of a first safety area; analyzing the monitoring information maintenance plan through the regulation system, and providing authorization to a substation background monitoring system according to content of the monitoring information maintenance plan; maintaining monitoring information according to authorization content; after completing maintenance, enabling the substation background monitoring system to automatically generate a latest monitoring information model and a latest graphic file, and trigger a maintenance and update ending signal; after the regulation system receives the maintenance and update ending signal, summoning the latest monitoring information model and the latest graphic file, and updating a monitoring information model and a graphic file in the regulation system. By maintaining an active close-loop source end of the monitoring information, the active close-loop monitoring information source end maintenance method greatly reduces a workload of monitoring information maintenance, guarantees timeliness and consistency of monitoring information updating of a master station and branch stations, and can effectively avoid safety problems of monitoring missing, or even mistaken monitoring, caused by unsynchronized updating of the monitoring information.