LabVIEW language is used to combine the magnetic field acquisition device and the motion control platform to develop a system that can automatically scan and reproduce magnetic fields in real time.The system includes a three-dimensional motion platform，a multi-channel Gauss meter，and host computer software．The collected data is stored in the file in real time，and is displayed in real time on the control interface in various forms such as graphs，two-dimensional intensity maps，three-dimensional vector arrow charts，etc．，to help users understand the magnetic field information in time． Finally，the external magnetic field distribution of the cylindrical magnet array used in the magnetic levitation experiment was actually measured using this system，and the external magnetic field distribution characteristics of the magnet array were clearly displayed，which proved the feasibility and reliability of the system．