A　multifunctional　intelligent　melted　iron　analyzer　is　researched　and　designed.　This　device　combined　the　function　of　thermal　analysis　for　quality　analysis　of　melted　iron　and　ultrasonic　measuring　for　nodularity.　By　thermal　analysis,　equation　of　linear　regression　was　used　and　the　percentage　composition　of　carbon,　silicon　and　phosphorus　etc.　were　obtained.　In　addition,　thermal　analysis　was　used　to　predict　gray　iron　inoculation　result,　structure　and　performance.　Therefore,　ultrasonic　measuring　was　adopted　to　be　applied　in　this　study　to　survey　the　nodularity　of　spheroidal　graphite　iron.　In　order　to　protect　the　analyzer　far　away　from　boiling　melted　iron,　wireless　temperature　collection　was　adopted.　The　system　is　composed　of　PC104,　single　chip　SPCE061　and　other　peripheral　circuits.　Designed　temperature　collection　and　ultrasonic　measuring　module,　the　software　of　data　analysis　and　management　is　programmed　by　VB6.0　based　on　PC104　and　windows　operation　system.　After　running　for　more　than　one　year,　the　analyzer　goes　very　well　in　the　foundry.　©　2008　IEEE.