Platform functions: First, full-life cycle traceability, integrating all data from factory delivery, installation, maintenance, inspection to scrapping, forming electronic files to realize whole-process query, traceability and retrospective investigation; Second, one-code correlation, each elevator corresponds to a unique QR code, and key contents such as maintenance records, inspection reports, fault information and rescue records can be viewed by scanning the code; Third, risk early warning, automatically early warning for overdue maintenance, frequent faults, overage operation and other situations based on IoT data, pushing to supervision departments and user units; Fourth, public service, opening owner complaint and suggestion channels to realize the closed loop of "finding problems — acceptance — disposal — feedback"; Fifth, data sharing, docking with the platforms of market supervision, housing construction, fire protection and other departments to realize data interconnection and mutual recognition, improving supervision synergy.