For　the　safety　of　dairy　products,　the　quality　of　milk　(raw　milk)　is　particularly　important.　Because　temperature　influences　the　number　of　bacteria　in　raw　milk,　the　suitable　temperature　can　make　the　storage　time　of　raw　milk　longer.　Therefore,　the　realization　of　raw　milk　temperature　monitoring　system　is　particularly　important.　The　two　key　problems　in　the　hardware　design　of　the　system　are　hardware　layout　and　power　supply　design.　These　two　problems　are　solved　by　applying　TRIZ　(theory　of　inventive　problem　solving)　theory.　TRIZ　theory　is　through　the　interaction　analysis　between　components,　using　physical　contradictions,　technical　contradictions,　and　combined　with　the　principle　of　invention,　finally　find　the　solution　to　the　problem.　©　Published　under　licence　by　IOP　Publishing　Ltd.