Stereotype is misunderstandings about people with personality, behavior, attitudes, competencies, and in connection with any group (gender, race, class, status, location). Includes any type of cognitive stereotypes toward people and other groups, but misconceptions and inaccurate information contained on them. In other words, people may even have some limited information or ambiguous, in the process of molding or exaggerate some facts to consider and generalize.The main issue of this paper is to understand the reasons and grounds for the formation of attitudes and ideas that each of us got stereotyped and stereotyped in relation to the surrounding environment and to pass them. Understanding and assessing the associated factors such as gender, age, location, economic status, employment status, education level, field of study and stereotypes main purpose of this article. In this study will be presented with the application of a survey, the views of the people (students of University of Tehran) about the identity of the community groups understand and analyzed.