An air conditioning system in which one outdoor unit and at least one indoor unit (3a, 3b) are connected to each other by a common refrigerant pipe, the air conditioning system comprising: a plurality of sensors configured to detect information relating to a state of a refrigerant or a state of a device or a valve provided in the outdoor unit or the indoor unit (3a, 3b); a short-distance wireless device that is connected to at least one of the sensors and is configured to receive sensor information from the connected sensor; and an air conditioning control device that is provided so as to communicate with the short-distance wireless device and is configured to receive the sensor information or information relating to the sensor information from the short-distance wireless device, and wherein the air conditioning control device includes a control parameter changing unit configured to change a control parameter of an air conditioning control on the basis of the sensor information or the information relating to the sensor information, characterized in that the short-distance wireless device includes an abnormality detection unit for detecting an abnormality on the basis of the sensor information, and a wireless communication unit configured to transmit an abnormality signal capable of specifying the detected abnormality to the air conditioning control device as the information relating to the sensor information, in a case where an abnormality is detected by the abnormality detection unit, wherein the control parameter changing unit is configured to change the control parameter in accordance with the abnormality signal, in a case where the abnormality signal is received from the short-distance wireless device. a plurality of sensors configured to detect information relating to a state of a refrigerant or a state of a device or a valve provided in the outdoor unit or the indoor unit (3a, 3b); a short-distance wireless device that is connected to at least one of the sensors and is configured to receive sensor information from the connected sensor; and an air conditioning control device that is provided so as to communicate with the short-distance wireless device and is configured to receive the sensor information or information relating to the sensor information from the short-distance wireless device, and wherein the air conditioning control device includes a control parameter changing unit configured to change a control parameter of an air conditioning control on the basis of the sensor information or the information relating to the sensor information, characterized in that the short-distance wireless device includes an abnormality detection unit for detecting an abnormality on the basis of the sensor information, and a wireless communication unit configured to transmit an abnormality signal capable of specifying the detected abnormality to the air conditioning control device as the information relating to the sensor information, in a case where an abnormality is detected by the abnormality detection unit, wherein the control parameter changing unit is configured to change the control parameter in accordance with the abnormality signal, in a case where the abnormality signal is received from the short-distance wireless device.