Further, in the above ventilation control system 1, the entire surroundings of the external environment sensor 21 is covered by air introduced into the casing 10 via the ventilation port 40.

According to the ventilation control system 1, the external environment sensor 21 can be less susceptible to an effect of heat conduction and radiation heat from the surface of the casing 10. That is, the environment of the external environment sensor 21 and the internal environment sensor 22 can be independent from each other, thereby improving detection accuracy of the environment. Accordingly, the ventilation port 40 can be appropriately open and closed, allowing the environment in which the electronic device 15 is located in the casing 10 to be an environment appropriate for operation of the electronic device 15.

Further, in the ventilation control system 1, the calculation unit 31 obtains the external environment from the internal environment sensor 22 and external environment sensor 21 via wireless communication.

According the ventilation control system 1, since the environment such as temperature and water droplet can be prevented from being transmitted via a cable, the environment sensors 21, 22 can detect the environment more accurately compared to the detection using wired communication.