In present day, it is admitted that Social Network Sites (SNSs) bring convenience, efficiency, fast, speed and width for adolescents' interpersonal relationship development. It also brings many difficulties to overcome. Some adolescents that are addicted to SNSs suffer a lot of mental health problems caused by Network mental disorders and Internet addiction syndrome. It brings a lot of negative impact on adolescents' mental health and social development. This study that researches the negative impacts on adolescents' interpersonal psychotherapy will significantly help colleges and universities' moral educators to play the network edge, overcome the disadvantages and make use of the Internet to cultivate adolescents' sound personalities and good psychological qualities.
SNS is also known as social network service. A SNS is an online service platform, or site that focuses on facilitating the building of social networks or social relations among people who, for example, share interests, activities, backgrounds, or real-life connections. SNSs such Facebook, Twitter works like this. Adolescents who become members of these SNSs communities, they will firstly get a personal profile which will show their personal information including the name, job, photo, relationship status, religion, hobbies and so on. "What differentiates SNS from previous media like a personal homepage is the display of one’s friend" (Boyd and Ellison, 2007). Except displaying a network of friends, other users can then click on their profiles and traverse ever broadening social networks. The three features including profile, friend and traversing friend list show the most crucial characteristic of SNSs. Currently, when adolescents create profiles, they often set unique names for themselves. Today, adolescents make use of lots of ways online to communicate with people, such as Wall Post, Status Update, Activity Feed,