The invention discloses an intersection controller system for tramcars. The system comprises vehicle-mounted control modules and vehicle-mounted GPS-RTK which are installed on all the tramcars, a wireless access point, an emitter, a receiver, a traffic signal controller, a control center, an intersection controller, an analogue simulation module and a control command checking module. Information interaction between the traffic signal controller, the control center and the vehicle-mounted control module is achieved through the interaction controller, and the output of each control command needs to be checked, so that the using safety of the system is improved greatly; each control command is demonstrated through analogue simulation before being output, so that control command output accuracy is further improved; precise positioning of the tramcars is achieved through the GPS-RTK, and reference is provided for control command output.