The invention discloses a monitoring method and a monitoring system of a drop-out fuse. The monitoring method comprises the following steps of collecting upper and lower side voltages of the drop-outfuse and current passing through the drop-out fuse; and obtaining the state of the drop-out fuse according to the upper and lower side voltages and/or the current. By adopting the monitoring method and the monitoring system of the drop-out fuse disclosed by the invention, the state of the drop-out fuse can be monitored, the position of a fault point of the drop-out fuse can be reported.