Abstract: As the scale of Hunan power grid continues to grow, the three-year action plan continues to advance, the requirements for secondary professional operation and maintenance are getting higher and higher, the personnel carrying capacity tends to be saturated, and the contradiction between the backward mode of production and the rapid growth of relay protective equipment is becoming increasingly prominent. According to related requirements, by using internet of things technology, combined with high-speed communication network and mobile terminal, the whole life cycle management of relay protection equipment is carried out to promote the second professional operation and maintenance, overhaul, patrol and inspection to be mobile, paperless and intelligent, to improve the informatization rate of field operation and maintenance, realize the leap from traditional equipment to information equipment, and from manual inspection to automatic inspection, from experience inspection to intelligent maintenance.