- Grid lines are intricate, inspection links, a variety of problems in the event of a failure is difficult to determine the first time - The economic losses caused by the fault investigation time is positively correlated to the normal operation of the residents of the production and life of great impact - Traditional monitoring equipment has blind spots, limited observation range and angle. - Traditional monitoring, data collected, independent of each other, not related to each other, it is difficult for managers to make systematic, global judgement.