(略) / Service-oriented Architecture (SOA) paradigm is an emerging architectural blueprint which enables flexible process-oriented application systems. While more and more enterprises plan to adopt SOA to increase reusability and flexibility of their business processes, the readiness of this technology becomes important to enterprises. However, previous SOA studies focus mainly on the technical issues but ignore the organizational or managerial issues. To fill this gap, this research aims to explore the factors of adopting SOA. Developed upon institutional theory and diffusion of innovation theory, we not only consider the technical factors with SOA adoption, but also pay attention to factors related with organizations and IT innovations. Furthermore, a content analysis of online Webs, blogs, and forums is taken to verify our research framework, and research findings indicate the relative advantage of SOA, compatibility of SOA, the characteristics of decision makers, culture, IT capability, and SOA socioeconomic characteristics are the most important drivers for SOA adoption. The contribution is summarized in two folds: (1) enterprises can use this framework as a reference to diagnose their organization conditions and then make a decision to adopting SOA; and (2) researchers can develop their study upon the constructs of this framework.