Core contents of the measures: First, three-color grade division, green grade is elevators with good safety status, yellow grade is elevators with general safety hazards, and red grade is elevators with major safety hazards; Second, differentiated supervision measures, reduce the frequency of supervision and inspection for green-grade elevators, with inspections no less than once every six months; inspect yellow-grade elevators no less than once every quarter; inspect red-grade elevators no less than once a week; Third, dynamic adjustment mechanism, establish a dynamic adjustment mechanism for elevator three-color grades, and adjust the supervision grade in a timely manner according to changes in elevator safety status; Fourth, information publicity system, elevator three-color grade information is publicized to the society, and three-color signs are posted in elevator cars to accept social public supervision; Fifth, joint punishment mechanism, interview the user units and maintenance units of red-grade elevators, order them to rectify within a time limit, and impose penalties in accordance with the law for those who fail to rectify.