A method for an smart gas flow monitoring based on IoT is provided. The method includes: generating gas transmission information with a time label based on sensor data uploaded by a pipeline sensor and historical sampling data uploaded by at least one of a gas gate station or a pressure regulating station; obtaining gas volumetric flows collected by a gas metering device deployed on a gas transmission pipeline at a plurality of time points within a current period; generating standard gas flows of the gas transmission pipeline at the plurality of time points based on the gas volumetric flows; generating a cumulative gas flow of the gas transmission pipeline within the current period based on the standard gas flows; and controlling at least one of an opening/closing state or an opening degree of a regulating valve of the gas transmission pipeline based on the cumulative gas flow.