手机发明之初的主要目的是为了语音通话,突破人际交流的空间限制,而短信则弥补了交流双方在时间上的限制,人际沟通的方式更加丰富、自由。手机与互联网的结合使其成为媒体,随着3G功能的普及、相关法规的完善,手机成为便携式、交互式、多媒体的大众媒体,被纳入我国危机传播管理的长效机制中,成为危机预警系统的重要组成部分。2012年7月21日,北京突发61年来 The main purpose of the invention of the mobile phone at the beginning was to make voice calls and break through the space limitations of interpersonal communication, while the short messages made up for the time constraints of both parties in the communication and the ways of interpersonal communication were more abundant and free. With the popularization of 3G functions and the improvement of related laws and regulations, the mobile phone has become a portable, interactive and multimedia mass media and has been incorporated into the long-term mechanism of crisis communication in our country and has become a crisis early warning system important parts of. July 21, 2012, Beijing burst 61 years