The　characteristic　of　grid　is　that　various　resources　are　distributed　and　dynamically　changed,　so　it　is　necessary　to　research　data　mining　system　in　grid　environment.　In　this　paper　we　first　introduce　grid　and　data　mining　concepts　in　grid　environments.　Secondly　we　bring　forward　five-level　architecture　of　GT4　and　OGSA-DAI-based　data　mining,　and　then　we　discuss　the　design　of　data　mining　grid　portal,　and　the　implementation　pattern　of　centralized　data　mining　service　and　parallel　data　mining　service.　Finally　discuss　the　implementation　pattern　of　OGSA-DAI-based　data　integration　service.