Abstract: The present world is at a time with frequent emergency. Medium as an important social power, plays a crucial role in crisis control and management. For an organization crisis may be either a disaster or a chance for a good change. Facing emergency, the functions of the media are embodied in the following three aspects: to reach the unity of keynote of the crisis spreading through inspiring the public; to shape an excellent image of the crisis management organizers by setting the focus of public opinion; and to maintain the regular operation of the society by meeting the s information demand of the public. Therefore, the information symmetry problem in crisis spreading is very important.