Social activities, which a person takes part in or visits all walks of life or a social problem, have the nature of taking society as the medium and are based on "society". A meaningful behavior of an individual or group against others to achieve the expected goal. Including all social interaction, is a role-playing process to meet social expectations. Social activities and social behaviors are common in many ways. Social psychology often uses the concept of social behavior to study the social activities of individuals and small groups, and does not involve large-scale social organization actions, which is different from social activities.