Java　Management　Extensions　(JMX)　provides　the　fundamental　architecture　and　standard　theory　for　monitoring　distributed　system.　ASM　is　a　very　small　and　very　fast　Java　byte-code　manipulation　framework.　A　performance　monitoring　system　is　designed　for　distributed　application　system　combining　these　two　technologies　and　has　been　integrated　seamlessly　into　the　Open　Education　Management　System　of　Central　Radio　and　TV　University　successfully.　The　conclusion　is　that　this　solution　can　achieve　run-time　monitoring　of　complex　business　in　large　distributed　system　and　has　good　performance　and　scalability.　©　2010　IEEE.