Verification system and method of turbine flowmeter

The invention provides a verification system of a turbine flowmeter. The verification system comprises a calibrator, a statistical module and a cloud module associated with the statistical module. The calibrator comprises a pipe body, a calibrator arranged on the pipe body, and an inner diameter detection device arranged on the pipe body. The inner diameter detection device comprises a support, a scraping device arranged on the support, a fixed disc arranged on the support, a telescopic frame rotationally connected with the fixed disc, a hinge rod rotationally connected with the telescopic frame, a rotating contact arranged at one end of the hinge rod, and a verification assembly arranged at the other end of the hinge rod. The supporting rod is arranged on the telescopic frame; the supporting assembly is arranged at the end part of the supporting rod; and the verification assembly at least comprises a laser arranged at the end part of the hinge rod and a shading plate used for receiving a signal of the laser.