The utility model discloses a fuse protector on -line monitoring system, including detection terminal, communication terminal and main website of system, detection terminal includes first main processing unit, electromagnetic field sensing unit to and the current -voltage detecting element, positional information acquisition unit, a local communication unit and the display element that link to each other with first main processing unit, the electromagnetic field sensing unit links to each other with current -voltage detecting element, communication terminal includes second owner processing unit to and the 2nd local communication unit, remote communication unit, the 2nd display element that link to each other with second owner processing unit, detection terminal fixed mounting is on each fusion tube of fuse, detection terminal sends the processing unit for communication terminal second owner with the fuse each item parameter that detects through a local communication unit, the 2nd local communication unit, second owner processing unit rethread remote communication unit sends the main website for the system.