It is effective to understand two or three-dimensional displays of magnetic field distributions to figure out the magnetic field environment or to consider a magnetic field mitigation method, if necessary. Measurement of the magnetic field, as well as positioning of measuring points in space, has to be performed rapidly because the source current varies vigorously. This change in source current will result some changes in field distribution. This paper proposes a novel visualization system of the low-frequency magnetic field generated by power facilities or electrical equipment. The system utilizes a skeleton tracking function of Kinect as a position determining method. At first, a handy wireless magnetic field sensor module is developed to observe the magnetic field efficiently in a large space and transfer data to a PC. Furthermore, the measured magnetic field is then projected onto a real image on a PC screen by colored marks depending on the fluctuation of magnetic field strength. Finally, the expediency of the proposed system is verified by performing some experiments in the laboratory.