Most of the international broadcast stations in the world have their historic background and tasks. International broadcasting prevails in the period of the World War ¢º and Capitalism against Communism. Its tasks include politics, military, religion and so on. But with time, along with the development of communication, Internet and media, global village gradually forms. The spread of international broadcasting in politics, military, culture and entertainment faces multiplication. Therefore, to take the listeners¡¦ acceptation becomes the essential condition of the international broadcast stations¡¦ existence. Besides tone quality and the signal¡¦s stability, broadcasting¡¦s quality should take the most consideration in the acceptation of the listeners in destination areas. The followings are three elements of broadcasting¡¦s quality: 1. Condition of psycho-acoustic quality. 2. Satisfaction among the listeners. 3. Motivation which can attract more listeners. In the research, it describes the outline and evolution of broadcast's engineering, international broadcasting's history and the course of change and development in Central Broadcasting System(CBS) and further studies and discusses the factors to affect broadcasting quality's engineering, listeners¡¦ listening behavior and listeners¡¦ figure in midland China. To study the relevance between international broadcasting 's quality and listeners¡¦ behavior in listening. It analyzes 632 letters from China¡¦s listeners and results as follow¡G A, The quality of international radio's broadcasting is related to the frequency of listeners who listen to the radio. There is acoustic difference among the regions, and it affects the listeners¡¦ willing to turn on the radio. B, The quality of international radio's broadcasting is related to " Use with satisfy " of radio listeners. " Program type " and " Host factor " show obvious otherness in listeners¡¦ sex and their living areas. C, The quality of international radio's broadcasting is related to the listeners¡¦ motivation in listening. People who are different sex and come from different areas have different motivation in " Takes interest in project " , " Problem discuss " , " Requirement " , " Take action¡¨ According to the result of this research, I brings up some suggestions after discussion: A, suggestions about the broadcastings quality of CBS to midland China, such as psycho-acoustic improvement, satisfaction with the listeners¡¦ usage requirement and enhancing listeners¡¦ motivation in receiving broadcasts. Two, suggestions about the development of CBS.