Since the mid-1980s，the process of democratization and the decentralization have brought a broader space and rapid growth for the development of Brazilian social organizations. On the one hand，the enormous and pluralistic civil society is an important part of state governance. The government has made great efforts in the management of social organizations through legal and administrative means and supervision，involving the establishment，operation，capital and external links of social organizations. A well-structured and relatively complete legal system and administrative procedure have been formed，and the cooperative relationship between the social organizations and the government have been guaranteed legislatively. On the other hand，social organizations play an increasingly important role in state governance. Politically，they participate in the process of political democratization through a variety of mechanisms and platforms and supervision to the behaviors of the government. Participatory budgeting is a representative case of participation in local governance. Socially，they take an active part in poverty reduction，education，health care，public security，social assistance and other fields to promote social justice. Economically，they contribute to the economic development，especially the efforts of environmental protection organizations in the sustainability of economic development. Actually，Brazilian social organizations and the government have formed a cooperative relationship with positive interaction.