The invention relates to the technical field of expressway data management and maintenance, and specifically discloses an expressway data management system. Specifically, the system comprises server platform software, a data management system, and a monitoring system of an internet of things communication system. The system uses a BS architecture, and comprises a maintenance unit maintenance condition and inquiry management module, a personnel management module, a device maintenance condition management and inquiry module, a device maintenance cost use condition inquiry management module, a spare part management inquiry module, an intelligent terminal APP module, and a filed device operating state monitoring module. The system is advantaged in that the management system can monitor and manage personnel, device maintenance cost, toll equipment, communication equipment, monitoring equipment, tunnel electromechanical equipment, ventilation and illumination equipment, and road out-field equipment, thereby improving efficiency of device operation, maintenance, and equipment inventory management. The system has functions of inquiring, retrieving, managing, and leading out all generated data in real time through a WEB method. Persons in different identities can operate and manage according to authority.