This research focuses on designing STEAM (Science, Technology, Engineering, Arts, and Math) educational themes for elementary students through experiential activity. Through research, part of the reasoning about STEAM education and its important role for primary school students has been identified and systematized. The study also analyzes the current state of STEAM theme design through experiential activities for primary school students. The results of the study included proposing specific processes for designing the theme of STEAM education through experiential activities for elementary students. These processes have been illustrated and applied in elementary classrooms. The results from this educational experiment have partly confirmed the accuracy and feasibility of the scientific hypothesis, as well as the effectiveness of the proposed measures.