A control method of a transport system, the transport system including a transport carriage for transporting a transported object, a plurality of communication devices (10 - 10m) respectively connected to a plurality of equipment (40 - 40m) to which the transported object is to be delivered, and a controller that controls travel of the transport carriage (30, 80), the control method comprising: obtaining, by the controller, equipment specifying information specifying a specific equipment (40 - 40m) to which the transport carriage is to deliver the transported object, the specific equipment (40 - 40m) being included in the plurality of equipment (40 - 40m); obtaining, by the transport carriage, a delivery position information by receiving, from the controller, a travel instruction instructing travelling up to the position of the specific equipment (40 - 40m); obtaining, by the transport carriage, carriage position information indicating the position of the transport carriage; calculating, by the transport carriage, a distance between the specific equipment (40 - 40m) and the transport carriage as a distance between the transport carriage and a specific communication device (10 - 10m) based on the delivery position information indicating a position of the specific equipment (40 - 40m) and the carriage position information, the specific communication device (10 - 10m) being included in the plurality of communication devices (10 - 10m) and being located at substantially the same position as the specific equipment (40 - 40m); determining, by the transport carriage, whether the distance is less than or equal to a predetermined distance; transmitting, by the transport carriage, a trigger signal wirelessly to surroundings, when the distance is less than or equal to a predetermined distance, the trigger signal being a signal for starting wireless communication between the transport carriage and the specific equipment (40 - 40m); and performing, by the transport carriage and the specific equipment (40 - 40m), wireless communication for delivery of the transported object between the transport carriage and the specific equipment (40 - 40m), when the trigger signal is communicated wirelessly between the transport carriage and the specific equipment (40 - 40m). obtaining, by the controller, equipment specifying information specifying a specific equipment (40 - 40m) to which the transport carriage is to deliver the transported object, the specific equipment (40 - 40m) being included in the plurality of equipment (40 - 40m); obtaining, by the transport carriage, a delivery position information by receiving, from the controller, a travel instruction instructing travelling up to the position of the specific equipment (40 - 40m); obtaining, by the transport carriage, carriage position information indicating the position of the transport carriage; calculating, by the transport carriage, a distance between the specific equipment (40 - 40m) and the transport carriage as a distance between the transport carriage and a specific communication device (10 - 10m) based on the delivery position information indicating a position of the specific equipment (40 - 40m) and the carriage position information, the specific communication device (10 - 10m) being included in the plurality of communication devices (10 - 10m) and being located at substantially the same position as the specific equipment (40 - 40m); determining, by the transport carriage, whether the distance is less than or equal to a predetermined distance; transmitting, by the transport carriage, a trigger signal wirelessly to surroundings, when the distance is less than or equal to a predetermined distance, the trigger signal being a signal for starting wireless communication between the transport carriage and the specific equipment (40 - 40m); and performing, by the transport carriage and the specific equipment (40 - 40m), wireless communication for delivery of the transported object between the transport carriage and the specific equipment (40 - 40m), when the trigger signal is communicated wirelessly between the transport carriage and the specific equipment (40 - 40m).