It has been the new subculture to use mobile phones among senior high school students. Most students use mobile phones or short messages to exchange messages and to know the feelings of each other immediately and privately. This way can promote students' identity and friendship. The aims of the research explore the behavior and culture; the relationship of the interaction; the value of consumption when students use mobile phones. The purposes of this research are to find the behavior and culture when students use mobile phones; the function of mobile phones in the interpersonal relationship; the influence on the value of consumption.