The role of the Internet is significant to our community. Through the Internet, people communicate with one another and each country is able to interact and develop the relationship not only easier but also faster. In particular, the internet helps people establish a diverse and complex relationship through the special aspects of its own. People are able to contact to each other fast and easily without any limitation of space or time. Consequently, the internet has played an important role to develop not only a personal relationship but also the society. However, as the internet affects our relationship to develop, it has also caused a serious impact called a cyber crime. Further, among the cyber crime, cyber bullying is another issue arising in these era. Nowadays, a number of people are threatened by cyber bullying as much fatal as they are struggle to have many serious problems in their life. Particularly, the aspect of anonymity and its unlimited attacks toward the victims devoted to cyber bullying' growth. As a result, our current community are endangered in the harassment of cyber bullying, and the community, therefore, should consider its perilous effect and look for the solutions in order to prevent cyber bullying.