Abstract: The implicit theory, for the laical, is a simple explanation of the social world. People’s understanding of the attributes of the social categorizations (e.g. race, religion, gender, occupation. etc.) have an important influence on individual’s processing, judgment and reaction to the group information. And which can also forecast group process notably, e.g., stereotypes, prejudice, discrimination, Meanwhile, the understanding also moderates the psychological effects of social identification, which also makes up the consideration in the process of society identify with individual diversity, and it has important contribution to the development of the social identity theory. And demonstration research shows that in the practice of improving and promoting to group relation, implicit theories could be used as an agency to reduce the stereotype and prejudice, and thus foster better group relation. In the future studies, there is a need to integrate the conceptions of the implicit theories, and adopt some longitudinal studies to provide scientific guidance for the practice.

Key words: implicit theories, stereotype, prejudice, social identity, group relation