Due to the impact of climate change, precipitation and rainfall intensity are increasing yearly in Taiwan. Therefore, slope disasters are also more and more serious. In order to reduce the damage of the slope dis-aster and increase the disaster prevention awareness for the whole people, the education of debris flow disaster prevention has been selected for game teaching in this study, hope to strengthen the disaster pre-vention awareness for the elementary school. At present, the learning methods of debris flow disaster pre-vention are mostly using the outdoor teaching and multimedia learning. In order to sprout the concept of debris flow disaster prevention for elementary school students of mountainous area, this study selected 349 student samples from six elementary school of mountainous area in Pingtung County to evaluate the education effectiveness of debris flow disaster prevention using game-based learning methods during 2020. Game-based learning methods used to teach debris flow disaster prevention for students by the pre-test and post-test. The results show that students have a significant effect for the knowledge of debris flow disaster prevention. It means game teaching are suitable for elementary school students of mountainous area in Pingtung County.