Questions are the primary cognitive learning strategies, and they serve to solve problems in a reciprocal way. These questions have been hampered in the classroom and have had a negative impact on students problem solving. In this study, 465 Korean and Chinese college students were surveyed to confirm the structural relationship among learners’ external hesitation of questioning, positive support of professors, and problem solving confidence and the mediating effect of positive support of professors in university class. In addition, we found that there are differences in the structural relations between the national differences between Korea and China and the level of learning engagement. As a result of the study, it was found that the more the perceived external hesitation of questioning were stronger, the lower the problem-solving confidence, and the positive support of the professor increased the problem-solving confidence. In addition, the positive support of the professor mediates the external hesitation of questioning and the problem-solving confidence. In addition, there are moderating effects of the nationality and the level of learning engagement. Research should be conducted to find out the various mediators that can mitigate the factors that interfere with the questions in the classroom. When these mediators are implemented as teaching strategies, the effects can be different depending on the cultural differences and the level of student engagement. It is necessary to consider it.