In　this　paper,　the　influence　of　circulating　cooling　water　temperature　and　ultrasonic　treatment　on　scaling　process　is　investigated　by　using　the　experimental　platform　of　fouling　dynamic　monitoring,　and　the　change　rule　of　fouling　thermal　resistance　and　scale　inhibition　rate　are　defined.　In　the　process　of　experiment,　ultrasonic　frequencies　is　20.7　KHZ,　and　the　power　changes　from　0　to　100　W.　The　experimental　result　shows　that,　under　the　condition　of　higher　water　temperature,　the　scaling　ability　of　circulating　water　is　enhanced,　and　the　fouling　thermal　resistance　is　higher.　Under　the　ultrasonic　treatment,　fouling　thermal　resistance　decreases,　and　the　scale　inhibition　rate　increases　with　the　increase　of　ultrasonic　power,　and　the　scale　inhibition　rate　is　up　to　36.8%.