The main purpose of this article is the author tries to examine how the news media work to define the ideological limits of truth by exploring how journalists produce news accounts which claim to be. The most important information in this article is the author uses respected correspondent speech and quote (fergal keane), ideas of liberal pluralist researchers, writings and background of karl marx, News corporation annual report (2003), example of political economists (p. 52), ideas of herman and. Chomsky and academic study (tuchman, p. 60) to support his argument. The main conclusions in this article are news values are always changing over time and are influenced differently from one news organization to the others; therefore, the journalistic standards is changing to be appropriate to the news organization"s priorities. Role of journalist: from the liberal pluralist perspective, the norms that the citizen"s right to freedom of speech is best protected by a market-based mass media system.