80年代中期以来，商业广播电视在世界各国蓬勃发展，商业竞争普遍加剧。这一商业大潮使各国的公共广播电视机构在方针、体制、节目和经费等方面纷纷发生程度不同的变革。可以认为，公共广播电视的使命和私营广播电视不同的有四项基本任务。一是“传播要为公民权的实现服务”。 Since the mid-1980s, commercial radio and television have been booming in various countries in the world, and commercial competition has generally increased. This commercial tide has caused various changes in policies, systems, programs and funding of public radio and television agencies in various countries in different degrees. It can be argued that the mission of public broadcaster television differs from private broadcasting television in four basic tasks. First, “communication should serve the realization of civil rights.”