Multi-source sensing data linkage early warning method and system based on overhead transmission line

The invention relates to a multi-source sensing data linkage early warning method and system based on an overhead transmission line. The method comprises the following steps: acquiring first monitoring data of a to-be-monitored overhead transmission line through a first acquisition unit; when the first monitoring data acquired by the first acquisition unit exceeds a first set alarm threshold value, acquiring second monitoring data of the overhead transmission line to be monitored through at least one second acquisition unit; acquiring a picture or a video of the overhead transmission line to be monitored through a camera; adding watermark information to the picture or the video, taking the picture or the video added with the watermark information as alarm information, wherein the watermark information comprises the collection time, the first monitoring data and the second monitoring data. According to the invention, the false alarm during early warning is reduced, and the early warning effectiveness is improv