By using a multi axis module to move the Tesla meter probe to a designated position and driving the measured rotor to perform uniform circular motion through a motor, the surface magnetic field of the rotor measured by the Tesla meter probe is digitized and transmitted to a computer. The computer's dedicated magnetic detection software corresponds the magnetic detection data and rotation angle to 36000 points/360 °, scans the magnetic distribution of the entire circle at the designated height of the rotor, and then moves the Tesla meter probe to the designated position on the next layer for repeated measurement and completion. The data is processed using surface magnetic distribution software, and the upper and lower limits of the specified parameters (magnetic pole peak value, magnetic pole area, magnetic pole angle) are compared to generate a measurement report. The detection result is judged and output as an OK or NG signal, which is displayed as a 2D waveform. Adopting a one-dimensional Hall probe.