This system quantifies produced gas from gas wells. All metering instruments, microcomputer control systems, straight pipe sections, valves, filtration modules and auxiliary equipment are pre-assembled on a compact skid platform for easy lifting and transportation. Pipeline layouts are customized to match process flow schemes, and the unit is classified as a non-pressure vessel for enhanced operational safety. It requires minimal manual adjustment during operation and serves a critical role in gas transmission systems, with broad applicability across oilfield production sites.