With　the　development　of　the　shipping　industry,　marine　environmental　pollution　problems　have　been　increasingly　attracting　so　much　attention,　but　the　problem　of　ship　bilge　water　discharge　violations　has　not　been　well　solved.　Based　on　the　analysis　of　the　problems　of　the　current　oily　water　separator　monitoring　system,　a　set　of　improved　oily　water　separator　system　of　monitoring　is　proposed.　The　system　is　integrated　with　flow　sensor,　the　positioning　module　and　AIS　(automatic　identification　system)　transmission　module　based　on　the　original　module.　The　total　amount　of　dirty　oil　can　be　calculated　by　the　oily　water　separator　during　a　period　of　time,　and　when　contrasted　with　the　normal　discharge　of　the　oil　to　get　the　oily　water　separator　operation　indicators　of　the　current　ship,　it　can　be　used　as　a　reference　to　the　maritime　administrator.　When　the　ship　receives　AIS　from　administrator,　it　will　automatically　reply　to　a　packet　of　query　message　of　the　ship　operation　indicators,　thus　improving　the　efficiency　of　the　maritime　administrator.　©　2015,　ICIC　International.