Case competition is the integration of technology and professional knowledge and promotes the reform of university culture education and teaching. This paper shares the process and results of case competition as a diversified educational approach of

computer network. This paper introduces the procedure of case competition, students' performance, harvest and feedback in detail. The case competition provides students with an opportunity to show themselves and allow them to exchange and discuss the theme of computer network diversity in an open and fair environment. The main task is to provide solutions to the problems related to computer network courses. Through the design of computer network case competition, it has a subtle impact on diversified education and teaching. Teachers are required to constantly update their comprehensive knowledge and enrich their teaching means. Students are required to think comprehensively and creatively about the theme of future network development in order to produce evidence-based solutions.