The invention relates to the technical field of energy supply and discloses a pipeline metering system to achieve the self-power supply of the pipeline metering system and accordingly improve the working stability of the pipeline metering system and reduce the operation and maintenance costs. The pipeline metering system includes a pipeline, a turbine, a transmission mechanism, a power generationmechanism, a metering transceiver and a flow meter, wherein there is a fluid inside the pipeline during working, the turbine and the flow meter are installed inside the pipeline in sequence in the fluid flow direction, the fluid drives the turbine to rotate, the turbine is connected to the power generation mechanism through the transmission mechanism, the power generation mechanism is electricallyconnected to one end of the metering transceiver, the other end of the metering transceiver is connected to the flow meter to receive flow information, and the metering transceiver transmits the flowinformation through wireless communication.