The sustainable information assurance system serves as a vital component of the autonomous knowledge system in auditing, a crucial pillar for the achievement of China’s dual carbon goals, and a key initiative for China’s participation in and leadership of global sustainable governance. This system aims to achieve autonomy in problem awareness, assurance methodologies, knowledge production, and discourse authority. It serves national strategic needs, empowers digital economic development, expands the independent knowledge system of auditing, and strives to secure China’s voice in global sustainable governance. This fully demonstrates the system’s indigenousness, openness, adaptability, and collaboration. The sustainable information assurance system is practical because it involves setting uniform criteria of assurance, coming up with and implementing innovative technologies of assurance, nurturing a multidisciplinary professional assurance workforce, intensifying the process of building sustainable resource-sharing systems, and gradually enhancing the collaborative governance systems. The system must exploit the special advantages of the socialist system with Chinese characteristics to the fullest. It will give strong practical backing on the national sustainable governance as well as export Chinese wisdom and offer Chinese solutions to the global sustainable governance through pilot demonstrations at multiple levels under various scenarios.