Off-site equipment remote maintenance monitoring platform system and monitoring method

The invention discloses an off-site equipment remote maintenance monitoring platform system and a monitoring method, and relates to the field of remote monitoring. The system comprises a plurality of remote terminal devices distributed in different places, a monitoring cloud platform located locally, and a client. The remote terminal device further comprises a terminal monitoring unit. The terminal monitoring unit can obtain operation state information collected at a remote terminal device, carry out analog-to-digital conversion on the operation state information, and upload the operation state information to a monitoring cloud platform in real time through a wireless network; the monitoring cloud platform can monitor abnormal data sent by the remote terminal equipment in real time, and obtain change trend data of the operation state information of the remote terminal equipment in the medium and long term time period, and the monitoring cloud platform analyzes the operation condition and the fault reason of t