*With　the　development　of　society,　data　science　such　as　machine　learning,　data　visualization　and　other　issues　have　expanded　to　various　scientific　fields　and　affect　our　lives　from　various　aspects.　In　this　article,　we　will　analyze　the　data　of　breast　cancer　characteristics　from　the　University　Medical　Centre,　Institute　of　Oncology,　Ljubljana,　Yugoslavia,　categorize　the　characteristics　of　breast　cancer　by　using　data　visualization　method,　and　learn　and　predict　the　whole　data　by　random　forest　model　to　obtain　the　most　influential　factors　for　the　development　and　recurrence　of　breast　cancer.　It　will　have　a　positive　impact　on　the　prevention　of　breast　cancer　in　the　future.　Also　the　reliability　of　the　algorithm　need　to　prove.