Based　on　the　analysis　of　application　integration　and　its　development,　a　service-oriented　framework　for　geospatial　application　integration　is　proposed　and　established.　The　framework　consists　of　Web　application　layer,　service　integration　layer,　service　layer　and　UDDI　et　al.　These　layers　are　corresponding　to　geospatial　information　integration,　geospatial　information　service　integration　and　geospatial　information　application　integration　respectively.　The　integration　solution　for　legacy　systems　is　proposed　from　data-level　and　business-level.　Integration　solution　for　geospatial　service　chaining　and　composition　is　also　addressed.　It　can　be　categorized　into　Series　model,　parallel　model　and　hybrid　model,　which　settles　the　two　key　issues　of　geospatial　application　integration.