Vibration monitoring & diagnosis skill is required to maintain the soundness of rotating equipments installed in large plants such as nuclear facilities. It is effective to bring up this skill with many number of experience of real incidents in actual plants, but abnormal phenomena occur randomly, so it takes a long time to learn from actual plants, and to increase human resources with excellent monitoring & diagnosis skill. To solve this subject, we developed the special unit (J-RAV) which simulated a few kinds of abnormal phenomena of rotating equipments. J-RAV has been utilized for education and training for two years by all maintenance personnel repeatedly. This article introduces our activities and achievements for these purposes with J-RAV.