The operation and maintenance technology of relay protection is gradually developing towards the direction of intelligence and network. The integration of information technology and communication technology is bringing great changes to the operation and maintenance model of relay protection. Relying on the mobile communication network and mobile Internet technology with high coverage, it can not only realize the transformation of paperless, portable and high efficiency,More importantly, it will bring new ideas, new experiences and new schemes for relay protection operation and maintenance, and reconstruct the relay protection operation and maintenance system and framework.