The invention provides a gas-liquid mixed flow type vortex shedding flowmeter calibration and detection apparatus system and a control method. The system comprises a calibration solution output unit, a gas injection unit, a calibration pipeline, a flow control unit, a standard metering barrel and a calibration and detection unit. In the gas-liquid mixed flow type vortex shedding flowmeter calibration and detection apparatus system and the control method, engineering parameters the same as engineering parameters output by a permanent magnet vortex shedding flowmeter can be output, and flow speed and bubble total amount of bubble content in a gas-liquid mixed conductive measured medium solution can be output; calibration of permeant magnet vortex shedding flowmeter products can be met and calibration of gas-liquid mixed streaming type vortex shedding flowmeter products; the gas-liquid mixed flow type vortex shedding flowmeter calibration and detection apparatus system can be widely applied to the fields of petrochemical engineering and urban water supplying pipelines; pipeline leakage can be effectively detected; and the gas-liquid mixed flow type vortex shedding flowmeter calibration and detection apparatus system is characterized by high calibration and detection precision and wide application range.