With the rise of powerful media——television,TV audiences have become more and more and watching television is becoming more and more random,which determines the differences of context among audiences.Context includes static context and dynamic context.Static context is the reasoning condition of cognitive pragmatic,the source and supplement of cognitive context.The understanding of discourse not only relies on static context,but also relies on cognitive context.Because of this,TV hosts need to make some necessary conversion and compensation to their own language according to the different cognitive context of the audience when making a program.