The increasing of globalization and flexibility required to the companies has generated.Over the last decade,the architectures and technologies used for enterprise application integration have been improved.But these traditional approaches have some disadvantages such as high cost,poor flexibility and vendor lock-in. And now,the service oriented architecture,advanced in loose-couple,low cost and high integration ability,is thought to be the most advisable approach for business integration. In this paper,we present a SOA based enterprise application integration platform and apply this platform in an environmental protection project-The increasing of globalization and flexibility required to the companies has generated.Over the last decade, the architectures and technologies used for enterprise application integration have been improved.But these traditional approaches have some disadvantages such as high cost, poor flexibility and vendor lock-in . And now, the service oriented architecture, advanced in loose-couple, low cost and high integration ability, is thought to be the most advisable approach for business integration. In this paper, we present a SOA based enterprise application integration platform and apply this platform in an environmental protection project