The free trade zone monitoring system uploads seal and vehicle information to the customs system for real-time monitoring of vehicle status and transport conditions. After passing through the customs checkpoint, the monitoring system sends the vehicle information again to inform the customs system of its entry into the on-route supervision area. The customs system unlocks and locks the vehicle as necessary upon entry into the on-route supervision area, and investigates any anomalies that occur. The Jointech cloud timely sends information from different regions to the customs system. The customs system intelligently identifies and allocates corresponding permissions for self-locking and unlocking based on the information received.