Abstract:Aiming at the multi-source heterogeneous problems in the contextual information of the Internet of Things in smart classroomsꎬ the research status of smart classrooms and contextual information modeling is analyzedꎬ and a method based semantic expression for modeling contextual information of smart classrooms is proposed. The situational information of the smart classroom is acquired through the sensoring equipment and the smart classroom management systemꎻ the re ̄ dundant information is filtered out and the E-R conceptual model is established based on the spatio-temporal correlation algorithmꎻ and the context information of the smart classroom is constructed using the Protégé modeling tool. After the logic test of the RacerPro inference engineꎬ the semantic relationship among the contextual information in the smart classroom is clearly displayedꎬ and the validity and reliability of the modeling method are verified.