Abstract: At present, the Web service is massively increasing, and the application technology of the Internet of Things（IoT） is rapidly developed and popularized, while the existing Web service selection algorithm remains inefficient and the user matching degree  stays low. Aiming at this issue, a context-based semantic Web service selection method under the circumstance of IoT is proposed. The method uses the nondimensionalization of QoS parameters and the dynamic selection of semantic Web services, combines services in the IoT environment with semantic Web services, and selects the optimal service set for QoS on the basis of user requirements. Experiments show that this method can effectively improve the success rate of user service dynamic selection.

Key words: semantic Web services, Internet of Things, situation, QoS parameters, success rate, service selection