Abstract: It is the mission of the course of “electromagnetic field” to integrate the abstract electromagnetic theory into high-tech and modern scientific practice. The electromagnetic simulations in the course can help students better understand the electromagnetic theory and cultivate students’ engineering thinking ability and engineering practice ability. According to the characteristics of the course, electromagnetic simulations of different levels are provided, from the simple visualization to the optimization of the electromagnetic field, with the final goal of designing electromagnetic devices. This way, a platform is provided for the students to carry out research independently. The students have learnt to observe, analyze and solve engineering problems from the perspective of electromagnetic fields. At the same time, a system is designed to ensure the fairness of the assessment. The teachings of the theoretical part and the experimental part are reformed together, which forms a joint force to cultivate electromagnetic field talents who are adapted to the modern industry.