In the current e-commerce applications, the existence of a large number of complex issues is mainly due to the complexity of e-commerce applications' own problem domain and the complication caused by building them on Web. In addition, constant changes in business environment have increased the difficulty of software development. Many styles such as heavy SOA style, the workflow-oriented architectural style, and original REST style are created to solve these problems. Unfortunately, the previous studies did not take into account all aspects, and made a number of assumptions excluding the realistic complexity and mutability to facilitate research. This paper attempts to find out the architectural constraints contained in the architectural styles by analyzing the styles mentioned above and to design a set of architectural constraints, which can induce desirable architectural properties for e-commerce applications — e-Commerce Application Architectural Style based on the Integration of Workflow and Agile Service. In this paper, we evaluate the effectiveness of this architectural style by theoretical derivation and implementation experience.