The　modern　metallurgical　equipment　with　functional　diversification,　structural　complexity　and　high　degree　of　automation　features,　once　the　critical　equipment　failure,　would　cause　enormous　economic　losses.　Wire　rod　mill　metallurgical　equipment　in　one　of　the　key　production　equipment,　on　the　bar　and　wire　rod　mill　for　online　monitoring　and　fault　diagnosis　is　essential.　In　this　paper,　bar　and　wire　rod　mill　monitoring　and　diagnosis　technology　research　and　application,　through　information,　network　monitoring　systems,　on-line　process　analysis　and　management,　temperature　monitoring　of　the　implementation　of　key　equipment,　key　points　on　the　equipment　condition　monitoring,　so　as　to　achieve　equipment　fault　diagnosis　and　predictive　maintenance　purposes.　Reduce　the　maximum　equipment　operation　and　maintenance　costs,　improve　production　efficiency　to　achieve　cost-effective　new　growth.