The stability and reliability of equipment is the fundamental guarantee for the safe and stable operation of metro，the hardware foundation for providing high-quality passenger service，and the precondition for further exploration of intelligent operation. Taking the rail transit operation company in Nanjing as an example，this paper introduces the construction of lean management system of equipment. It specifically analyzed how to realize the boost in the efficiency of equipment management，and established 69 overhaul procedures and 151 evaluation standards of facilities and equipment，and analyzed specific cases such as bogie overhaul，spare parts management，robot intelligent inspection of main substation，line safety comprehensive monitoring，and show the application effect.