With the increasing automation and miniaturization of teaching media, the emergence of new teaching media, the multimedia, integration and networking of teaching methods, and the diversification of modern teaching service objectives.

The application of computer-based information technology in education and teaching has produced modern educational technology, which is an open education system with strong educational adaptability and wide service scope. It not only has a profound influence on teaching mode, teaching content, teaching means and teaching methods, but also causes the reform of the whole educational thought, teaching theory and education system.

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Modern educational technology is the theory and practice of using modern educational theory and modern information technology to realize teaching optimization through the design, development, utilization, management and evaluation of teaching and learning processes and resources.

Modern educational technology originated in the United States in the 1930s. The development of modern educational technology in China began in the 1980s and originated in the United States. At that time, it was called audio-visual education in China. Modern educational technology is a modern educational means and method system that applies modern educational theory to education and teaching practice.

Modern educational technology is a carefully selected and reasonably organized learning material. These learning materials should not only meet the needs of society and students' personal learning, but also conform to the cognitive laws and be suitable for students' learning. This is a software component of educational technology.

Educational technology is also a method to design, implement and evaluate the teaching process. Such as Comenius' intuitive teaching method, Herbart's four-stage teaching method and the heuristic teaching method advocated by Confucius, an ancient educator in China. This is also an integral part of educational technology.

One refers to emerging educational technology, which corresponds to traditional educational technology. This understanding emphasizes the innovation of tradition; The other category refers to the educational technology being used, including traditional educational technology and emerging educational technology. Because the scope of the second formulation is wider than the first one, this paper calls the first formulation a narrow understanding and the second formulation a broad understanding.