This paper presents a reference framework for enterprise application that use SOA architectural style. Firstly, we review the characteristic of enterprise information systems and the evolution of IT technologies. So we can conclude that using SOA approach is inevitable. Then this paper summarizes the main concept, ideas and applicable areas of SOA. We detail to discuss the classical enterprise application architecture and ESB-based SOA solutions. Based on the above notions, we recommend new proposal based-SOA framework architecture for enterprise application, and give several standby technologies and platforms that can build SOA style system.