The utility model relates to a gas storage device puts out a fire belongs to the pressure container technology field. The device includes: bottle and bottle valve, the piston cylinder has in the bottle valve, the cylinder and the inside intercommunication of bottle of piston cylinder, the piston and the piston rod fixed of piston cylinder, the piston rod stretches out the tip fixedly connected with resistance strain gauge of cylinder, and a microprocessor's first input end is connected to resistance strain gauge's output, microprocessor's first output is connected with quick connector and liquid crystal display, battery or external power supply's mode still is equipped with in the bottle valve, for resistance strain gauge, microprocessor and liquid crystal display power supply. The utility model provides a gas storage device puts out a fire utilizes the piston cylinder of known area to monitor internal pressure to show and the transmission with digital mode, make the supervisor can learn the concrete numerical value in the bottle, compare in the colour of tradition machinery table and distinguish, state that can more audio -visual acquisition steel bottle.