Audio-visual education is a modern educational theory and practice by means of computer, projector, slide show, recording, video recording, broadcasting, film and television. Using modern educational theory and technology, the teaching process and teaching resources are designed, developed, applied, managed and evaluated to realize the modernization of teaching.

With its own advantages, mini-projector is playing an increasingly important role in audio-visual teaching. How to make full use of projectors and improve the effect of modern audio-visual teaching is a topic that every teacher who uses projectors is very concerned about. Teaching projector is mainly aimed at the classroom teaching of school teachers; The combination of modern education and educational ideas is more suitable for the educational ideas, forms and characteristics of modern production system, modern economic system, modern cultural system, modern science and technology and modern social lifestyle. Traditional projectors are inconvenient to carry. Because of naughty students, the projector in the school classroom is unsafe and easily damaged by students. The portability of mini-projector makes up for the teaching vacancy, which is convenient for teachers to store materials through the projector for teaching, and saves the trouble of textbooks and handwriting with pen and chalk.