In　this　paper,　we　design　a　system　that　it　is　used　for　simulating　heart　and　lung　auscultation　for　medical　students.　The　single　chip　BF518　with　low　power　assumption　and　higher　performance　is　used　in　the　system　as　the　core　processor.　And　it　can　play　16　audio　files　at　the　same　time.　So　the　system　becomes　more　realistic　in　the　operation　of　the　real　clinical　environment.　In　the　class,　the　reproduction　of　clinical　scenarios　for　learners　could　provide　a　risk-　free　learning　environment　of　the　clinical　knowledge　and　skills.　Additionally,　for　added　security　of　the　audio　of　case,　they　are　all　encrypted　and　stored　in　the　SD　card.