The invention discloses a device for metering natural gas flow through a computer. The device comprises a turbine pipe, an air inlet pipe flange is arranged on one side of the turbine pipe, an air inlet pipe is installed on the air inlet pipe flange, an air outlet pipe flange is arranged on the side, far away from the air inlet pipe flange, of the turbine pipe, an air outlet pipe is installed on the air outlet pipe flange, an impeller is arranged in the turbine pipe, a mounting plate is arranged on the turbine pipe, a flange plate is installed on the mounting plate, flange screws are arrangedon the flange plate, and a fixed base is installed on the flange plate. The device has the advantages that natural gas use time can be detected, for example, if natural gas is used continuously and exceeds normal duration, an audible and visual alarm can send a buzz alarm signal to draw attention from a user, natural gas leakage or safety accidents caused when the user forgets about the fire are avoided, alarm can be raised to an arranged phone at the same time in cooperation with a microcomputer, alarm can be raised to an alarm center if networking is achieved, and the safety is guaranteed.