The rapid development of the information technologies and computer networks have crucially changed the vital environment and the psychology of the modern human beings. Television, internet and other means of mass media are not only taking the leading positions in organizing the leisure and entertainment for the people but also influence their life views, expectations and attitude towards themselves, the other people or various situations and events of their lives. Along with that the extension of the virtual world leads to the contraction of the objective reality. The newly introduced cyber space areas and cyber communities appear to be the substitutes for the people's natural social networks partially or totally. The natural social networks for a human being is his or her friends, colleagues, relatives or occasional acquaintances.