A control system including a master control apparatus, a slave control apparatus communicably connected to the master control apparatus with a predetermined communication method, one sensor (2a-2c) configured to measure a predetermined environmental parameter, and a radio, the radio formed to be capable of performing wireless communication with the one sensor (2a-2c), and configured to be connected, via wired communication, to the slave control apparatus, the radio comprising: a connection unit that is configured to connect the radio to the slave control apparatus such that the wired communication is performed through one communication port (30b-30d) among a plurality of communication ports (30a-30d) provided in the slave control apparatus; an identification information collection unit that is configured to collect, from the one sensor (2a-2c), identification information of the one sensor (2a-2c), wherein said identification is used for identifying the one sensor (2a-2c) by the slave control apparatus and the master control apparatus and has a data configuration that is grasped by the master control apparatus and the slave control apparatus, when the radio is initially connected to the one sensor (2a-2c) via the wireless communication; and characterized by the radio further comprising: a measurement information collection unit configured to repeatedly collect the predetermined environmental parameter from the one sensor (2a-2c), and a transfer control unit that is configured to, based on the identification information collected from the sensor (2a-2c) by the identification information collection unit and based on the predetermined environmental parameter repeatedly collected from the sensor (2a-2c) by the measurement information collection unit, form a virtual sensor that is directly connected to the one communication port (30b-30d) of the slave control apparatus and is adapted to be controlled in accordance with instructions communicated from the master control apparatus with the predetermined communication method. a connection unit that is configured to connect the radio to the slave control apparatus such that the wired communication is performed through one communication port (30b-30d) among a plurality of communication ports (30a-30d) provided in the slave control apparatus; an identification information collection unit that is configured to collect, from the one sensor (2a-2c), identification information of the one sensor (2a-2c), wherein said identification is used for identifying the one sensor (2a-2c) by the slave control apparatus and the master control apparatus and has a data configuration that is grasped by the master control apparatus and the slave control apparatus, when the radio is initially connected to the one sensor (2a-2c) via the wireless communication; and characterized by the radio further comprising: a measurement information collection unit configured to repeatedly collect the predetermined environmental parameter from the one sensor (2a-2c), and a transfer control unit that is configured to, based on the identification information collected from the sensor (2a-2c) by the identification information collection unit and based on the predetermined environmental parameter repeatedly collected from the sensor (2a-2c) by the measurement information collection unit, form a virtual sensor that is directly connected to the one communication port (30b-30d) of the slave control apparatus and is adapted to be controlled in accordance with instructions communicated from the master control apparatus with the predetermined communication method.