As the initial form of human civilization, games are symbolic interactive behaviors full of emotional communication. With the development of technology, mobile online games have become a new mass entertainment and social media and profoundly changed people's communication mode. Mobile online games have inherited the emotional interaction behavior in traditional games, but also opened up a new emotional interaction mode, reshaping modern people's cognition and communication. Players establish contact with other players through games to produce interactive behaviors, and the essence of interactive behaviors is the process of emotional communication. The rapid development of mobile online games has not only changed the development of social economy, but also changed the economic and social relations between people and society, as well as the emotional cognitive style. This paper holds that the essence of any interactive behavior is the process of emotional communication, which will have a far-reaching impact on society and individuals. Studying gamer and society under modern conditions from the perspective of emotional communication may better understand our life and existence. On the other hand, in the process of emotional interaction, the inevitable conflict causes one or more negative emotions to breed, which may gradually develop into serious social problems, especially adolescent health problems. Therefore, how to make better use of the positive effects of emotional communication in mobile online games in real life, work and study, and how to avoid and solve the social and personal problems that may arise in the process of emotional communication in mobile online games are practical problems that need to be further considered and solved in future research.