Model image, often the image of pioneers and organizations that have been historically successful, has important effects on journalists. Though can not be directly perceived, they are usually shaped through interpersonal communication and mass media and resorted to recipients’ collective memory which becomes inherited guide to their actions, Social and political conditions also play a part in that process. Through sorting out the changing images of Ta Kung Pao and Zhang Ji-luan in Taiwan since 1949, this paper reveals the interaction between them. When government has strong control on society, model image construction strictly follows official manner.; when such control is weakened, model image will deviate from government's expectation and is more likely to concede to model’s imagination of the profession. Furthermore, it will deconstruct its offcial counterpart and even direct collective memory to the opposite side against conventional pattern. Images deriving from both conditions are one-sided emphasis on historical memory. It is images based on reliable and comprehensive historical facts that people should strive to pursue.