The present invention discloses a junction box remote monitoring and early warning method. The method comprises a step of initializing each member, detecting whether the working of each member is normal or not, entering into a next step if the working is normal, and carrying out initializing again if the working is abnormal, a step of transmitting the data of a short circuit grounding fault sensor and a cable head to a wireless data collector, judging whether the short circuit grounding fault and cable head temperature exceed a predetermined value or not, entering into a next step if so, and continuing to collect data by the wireless data collector if not, and a step of transmitting a fault point to a server by the wireless data collector, and emitting alarm information by a server. The junction box remote monitoring and early warning method has the advantages that the cable head operation temperature real-time data and alarm information are provided for grid operation and maintenance personnel, the operation and maintenance personnel are helped to timely find the defect and risk in the cable head so as to timely carry out maintenance and disposal,, the cost of operation and maintenance and repair is reduced, and the labor intensity is reduced.