To solve the operation and maintenance difficulties due to large-scale random power access and widespread distribution, this paper proposes a plug and play operation and maintenance scheme based on the internet of things (IoT). The scheme adopts mobile internet technology and geographic information technology, which realizes the plug and play of equipment operation and maintenance, and accurate positioning of the real scene. The warning expert system based on four dimensional health assessment model of maintenance can find the hidden danger early and give safeguard in advance, which can well meet the need of operation and maintenance for random power.