Power transmission line monitoring method and system

The invention provides a power transmission line monitoring method and system. A data transmission link can be established with each external monitoring device based on a preset transmission protocol. And then, obtaining the power transmission line diagram of the target area, and displaying the power transmission line diagram in a first display frame of a display interface. And in response to the fault information pushed by the line scheduling system, determining the occurrence time of the fault and the position of the fault in the power transmission line diagram. And determining a first monitoring device in a preset range of the fault position, and obtaining alarm information of the first monitoring device at the occurrence moment based on the transmission link. And determining the cause of the fault based on the alarm information, and changing the icon state of a second monitoring device associated with the cause on the power transmission line diagram, so that the cause of the fault is displayed in a second