Intelligent voice prompting system is one of the indispensable infrastructure of every school. Despite the rapid development of video technology and network technology in recent years, voice prompting system is still applied by all kinds of schools because of its practicability, economy and convenience. All kinds of schools in our country have public broadcasting system basically. It is mainly used in various public occasions, such as holding school-wide activities, notifying, raising the national flag, interval exercises, broadcasting interval music, praising the advanced, convening the whole school conference and so on. With the development of modern information technology and the popularization of multimedia teaching in primary and secondary schools, the demand for phonetic teaching by means of phonetic system is increasing, especially the popularization of music rings, the implementation of English listening tests, and the functions, capacity, quality and intelligence of the existing school phonetic system. They all put forward higher requirements.