It is on-line multi-functional measuring equipment used to measure and analyze the surface magnetic field distribution of ring magnetic materials. In combination with independently developed software system, it is in a good position to conduct measuring of ring magnetic products or motors for their circumference magnetic field distribution, end side surface magnetic field distribution, inner circumference magnetic field distribution, especially suitable for measuring multi-polar magnetic appliances. It is of advanced automation and equipped with nearly all necessary functions. Working modes include surface magnetic field measuring and magnetic flux measuring. There are three measuring patterns available: