As a state of law as well as a democratic state, Indonesia guarantees and protects the right to freely express opinions and the right to organize in society. This in the end becomes the basis for every member of the community to be free to establish an Ormas. The freedom to establish these mass organizations in its development is not controlled due to the absence of real government control and supervision. This has resulted in many mass organizations being born into thugs and illegal organizations. This study aims to analyse the current system of supervision of mass organizations in Indonesia, the weaknesses in the current implementation of mass organizations, and the ideal reconstruction of a system of supervision of mass organizations capable of realizing a just law of mass organizations. The research in this dissertation uses the sociological juridical method. As for the results of the research conducted, it can be found that the current implementation of normative supervision has not been effective, as evidenced by the large number of problematic and prohibited mass organizations, weaknesses in the supervision of mass organizations in the community due to a legal vacuum in the regulation of supervision of mass organizations, so it is necessary to reconstruct values by conducting supervision and education. regarding the goals of mass organizations and the goals of the state and nation as well as legal reconstruction in the form of adding provisions for the supervision of mass organizations in the Law of the Republic of Indonesia Number 16 of 2017.