This explanation paper is described on positioning and content of the activity of an investigation expert committee of the power magnetic material for the utilization technique of electrical machinery and apparatus. The effective activation method of the power magnetic material is necessary in order to develop the high efficiency electrical machinery and apparatus. The characteristic measured by the standard measuring method is insufficient, and the grasp of the magnetic characteristic in proportion to drive condition of real machine is required. Our committee investigates vector magnetic about research situations such as the stress effect, vector magnetic characteristic, etc. and the examination are carried out.