An air conditioning system in which one outdoor unit and at least one indoor unit 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 ; 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 ; 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 . <EOS>