Due to the rapid development of internet technology, big data, artificial intelligence, multimedia and other new technologies are updated rapidly, and all walks of life have an increasingly urgent demand for information technology. As a base for teaching and cultivating talents, schools should adapt to the development of the times and make full use of information technology to carry out educational activities. For example, "Internet plus" can be used for innovation in school teaching mode. This paper mainly talks about the innovation research of "Internet plus" volleyball teaching system in the context of the information age. This paper analyzes the influence of "Internet plus" on the teaching mode in universities and colleges, and studies how to use the "Internet plus" to change the teaching mode of Volleyball in universities. The results of this paper show that the "Internet plus" volleyball teaching is a new teaching system that is united and common. It helps to break the traditional volleyball teaching mode in universities and colleges, and improve the single teaching form, the limitation of time and space, and so on. The confidence interval of SPSS17.0 is 0.96. The use of multimedia in the "Internet plus" volleyball teaching system improves the volleyball performance of students, and promotes the smooth progress of Volleyball Teaching in Colleges and universities.