The　common　data　acquisition　system　which　is　proposed　in　this　paper　has　achieved　features　of　monitoring　layer　and　data　collection　layer　(Complete　the　construction　of　ARM9　system　board　hardware　and　software　environment;　implement　the　design　of　STM8L　acquisition　board;　design　such　application　modules　as　host　MODBUS,　slave　MODBUS,　parameter　setting,　real-time　data　communications,　real-time　graphical　display,　local　data　storage,　ADC,　digital　filtering　and　so　on).　Judging　from　the　system　test,　it　can　achieve　the　desired　effect,　and　especially,　STM8L　ADC　data　acquisition　board　has　highly　precise　and　consumes　low　power.　©　(2012)　Trans　Tech　Publications,　Switzerland.