Since the inauguration of the National Health Insurance System in Taiwan, the state, in the name of the reassurance of the qualities of medical services, has transferred the medication industry from the regime of free market to planned economy, and consequently, the regulation of medical insurances and medical services are relocated from the private law sphere to the public administration involving coercive state interventions. The pros and cons of such changes have entailed comments and analyses on all aspects, though it remains in hesitation whether the medical personnel and citizens may properly recognize and accept the system. Moreover, it should also be reinvestigated whether the practices of the National Health Insurance System or so called excessive state interventions will incur negative effects on the future developments of the medical system. In modern democratic society, citizens' participations, transparency of information and society autonomy are important principles for managing public affairs, it is so worthy to examine whether the nationalization of the medication industry is against the tide of democracy. The paper is studied on the democratization of the supervision on the National Health Insurance System in Taiwan. It is analyzed with conceptual analyses on the relevant supervisory laws, reviews on the basic principles governing existing National Health Insurance System and its future reforms and discussing the supervisory amendments and adaptable measures which could be proposed to achieve relative regulations to meet the public needs and environmental evolutions. And then, taking the supervision for example, to servey the possible paths and the law norms for following roads of social democracy after political and economic ones.