This research is a study on the design features and policy measures for market stabilization in the KETS, including the potential issues and available recommendations at the present. It aims to contribute to the successful settlement and development of the KETS as a pillar strategy of environment policy in Korea. Furthermore, the study on the uniquness of the market stabilzation measures in the KETS could provide a another exemplar for the developing countries to prepare the launch of the ETS in near future. In the Chapter 2, the development process of the KETS (Charter 2-1) is chronologically described as background knowledge. Together with the national emission reduction target, the cap in the KETS is reviewed. Especially, the characteristic of cap coverage is discussed on the perspective of the market liquidity. (Chapter 2-2). The next is to look through the main characteristics of the KETS for market stabilization, which will help understand the policy measures for the market flexibility in the KETS.(Chapter 2-3) For this study, it is necessary to benchmark strategically the volatility of price spike and crash of the EU ETS and to learn the lessons from the experiences which the EU ETS has gone through over the almost past 10 years. The strategic benchmarking includes the performance evaluation (Chapter 3- 1) and the review on the current reform proposal for revitalization of the driving efficiency in the EU ETS (Chapter 3-2). Next the lessons learned through strategic benchmarking on the EU ETS (Chapter 3-3) is summarized for the contribution to the KETS. Finally, in chapter 4, the comparison of market stabilization between KETS and EU ETS (Chapter 4-2) is followed by the previous reform options of the EU ETS (Chapter 4-1) which is very useful to gain the comprehensive perspective for market stabilization measures. The current status of the KETS and the MSM actions took recently by the Government are handled in Chapter 4-3. In conclusion, the available policy recommendations for the KETS at the present stage are presented.