The　integration　of　heterogeneous　multi-source　geospatial　information　always　has　been　the　research　focus　of　geographic　information　sharing.　As　an　efficient　tool　to　describe,　discover　and　retrieve　the　information　source,　metadata　is　the　key　technology　the　implement　the　integration　and　sharing　of　information　sources.　Metadata　directory　service　is　to　describe　various　information　use　metadata　as　the　basic　directory.　The　publishing,　discovery,　abstain,　access　and　management　of　information　would　be　realized　by　register　various　metadata　information　of　information　resource　to　directory　service.　So　as　to　gets　the　purpose　of　information　sharing.　On　research　of　the　expression,　collection　and　storage　of　metadata,　the　organization　of　services　oriented　directory　information　was　explored,　the　metadata　directory　service　model　was　realized.　Through　the　organic　combination　of　metadata　and　directory　service,　the　information　resource　which　was　distributed　physically　can　be　shared　logically.　©　2011　IEEE.