System networking method, anti-theft system and freight equipment

The invention relates to a system networking method, an anti-theft system and freight equipment. The system networking method comprises the following steps that a main controller allocates a network number to a sensor, wherein the sensor is installed on a target base in a plurality of bases, and a networking application carries a first identity identifier of the sensor and a second identity identifier of the target base; the sensor establishes a communication channel with the main controller through the network number so as to complete associated networking with the main controller; after completing association networking with at least one sensor installed on all bases in the container, the main controller sends an association application to a server, wherein the association application carries a first identity identifier of the at least one sensor and a second identity identifier corresponding to the base; and the server completes associated networking of the container, the main controller and the at least o