The contactless IC card gas meter has the functions of prepayment and stepped gas price, and can be added with the function of leakage alarm and valve closing. Users will pay the gas fee to the management department. The management department will write the gas purchasing amount into the IC card. After users input the information in the IC card into the gas meter, the gas meter will automatically open and supply gas. In the process of users'use, the micro-computer in the gas meter will automatically check and reduce the remaining amount. When the purchased gas is exhausted, the gas meter will automatically shut off the valve and shut off the gas. After purchasing the gas again, the card can be swiped to open the valve for gas supply.

The gas meter can set multiple demarcation points and stepped gas prices, and automatically determine the appropriate amount of gas price reduction according to the different monthly consumption.