This research designs a system, which can use the text emotion analysis to understand the students' speech situation in the discussion room and the discussion area, to explore the relevance between the content and the course, and use the emotion analysis to calculate the emotion score for the discussion content of the discussion room, and then to explore whether the positive and negative aspects of the emotion are related to the speech and the course relevance.<br>Through the experiment, it is found that after the system analysis, the teacher can quickly browse the students' speech status and content through the data after the system analysis. Through the analysis, the teacher does not need to browse every student's message in the discussion area once again, and can make individual inspection from the week with special system analysis results.<br>According to the results of Experiment 3, the emotional scores of the speech content and the curriculum relevance are positively correlated<br>
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