Based on the research and exploration of the recent experiment mode, we proposed an outdooropening experiment mode. We elaborated its basic principles, put forward its construction and application methods, and carried out the outdooropening experiment in electromagnetic field experimental course. The result shows that the outdooropening experiment mode is helpful for students’ cognitive ability of abstract conception, improves their practical ability, brings their enthusiasm into practice, and cultivates their innovation spirit. However, relative problems of the mode need further exploration and research.