To provide a gas meter system which enables a gas consumer to watch security information on a daily basis, notice alarm display performed by the gas meter immediately on the occasion of the alarm display, and perform restoration operation from inside a house, and moreover, enables a gas enterpriser to perform meter-reading work outdoors, as before.

As the gas meter system, a first device is installed indoors having a flowrate measuring means, an interrupting means, a security monitoring means, a security information notification means, a communication means, and a restoration operation means, and a second device is installed outdoors having a measured value display means and a communication means. Then the first device and the second device are connected in communication enabled manner.