This device is mainly used for online detection of impurities, moisture, viscosity and other qualities in lubricating oil, as well as automatic purification and maintenance of demulsification, moisture and impurity particles, oxides, and saponification substances in oil, as well as quality repair; It has adopted five proprietary technologies, and independently developed composite polymer online maintenance technology, hydrocarbon based online repair technology, etc., which have been used in metallurgy, power, shipbuilding, chemical industry, machining and other industries for many years. It has also launched a special ultra small detection and purification machine for wind power generation, which has a shape of only 430 * 600 * 830mm, and is equipped with special background analysis software and servers.