This study systematically compares and analyzes the regulatory management systems of Australia and South Korea based on the four core components of regulatory governance. The findings indicate that the two countries share considerable similarities in terms of key institutional arrangements, including mandatory Regulatory Impact Analysis (RIA), the operation of sunset clauses, and legally mandated stakeholder consultation. However, significant differences are identified in the scope of regulatory concepts, institutional design, the integration of regulatory tools, and the level of stakeholder engagement. With respect to the concept of regulation, Australia adopts a broad, impact-based definition that encompasses a wide range of government policy proposals, whereas South Korea maintains a relatively narrow legalistic definition. Regarding regulatory processes, Australia has established a well-developed two-tier assessment framework based on the principle of proportionality, together with diversified and institutionalized stakeholder consultation mechanisms. In terms of regulatory tools, Australia effectively integrates Impact Analysis, Post-Implementation Review, and sunset clauses into a coherent regulatory lifecycle management framework. In contrast, South Korea's regulatory management system exhibits relatively weaker linkages among these regulatory instruments.