To provide a gas supply information managing system capable of exactly detecting the abnormality of gas corresponding to the condition of gas equipment owned by a demander in the case of detecting abnormality in the supply of gas while utilizing a gas supply system provided with an abnormality detecting means for detecting abnormality in the supply of gas on the basis of the characteristic information of gas equipment from the flow rate, which is measured by a measuring means, of gases to be supplied to the demander.

This system is provided with a receiving means for receiving the recognition information of prescribed gas equipment owned by the demander while utilizing the gas supply system and having a database relatively storing the recognition information of the gas equipment and the characteristic information, a retrieving means for retrieving the characteristic information of the prescribed gas equipment related to the received recognition information of the prescribed gas equipment from the database, and a transmitting means for transmitting the retrieved characteristic information of the prescribed gas equipment to the gas supply system.