We propose a service-oriented web application framework named iWeb, which enables web application adaptive to both context and QoS. In iWeb, a context model is established and context information is collected systematically according to the context model. An innovative service selection approach based on context and QoS is proposed in the framework as the leverage of implementation of application adaption. This approach can select the best services respect to QoS and context. For the usability of iWeb, thousands of available web services are collected and grouped by functionality in order to make service selection practicable. By providing development tools, service-oriented web application can be developed easily, and can fulfill its functionality using the selected services. The framework makes service-oriented web application more adaptive and flexible.
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