Security　and　reliability　of　the　compressors　are　very　important　as　a　kind　of　the　important　huge　equipment　in　mine.　Based　on　analyzing　of　the　working　principle　and　basic　structure　for　the　screw　air　compressor,　a　typical　condition　monitoring　method　based　on　the　Modbus　TCP　Protocol　is　presented.　With　this　system,　real-time　remote　monitoring　of　screw　air　compressors＇　state　and　related　operation　parameters　was　realized;　in　addition,　the　latent　faults　of　screw　air　compressors　on　working　could　be　predicted　and　warned.　And　the　accidents　of　screw　air　compressors　are　avoided　efficiently.　Finally　the　paper　presents　the　data　acquisition　and　processing　method　by　compiling　and　runningVB6.0　program.