우리나라 개발제한구역은 1998년∼1999년 「환경평가」제도를 도입, 해제를 위한 합리적인 조정을 진행하였다. 이후 2014년∼2015년에 환경평가등급 재평가가 시행되었고 개발제한구역 환경평가등급의 변화 가능성이 나타났다. 이에 본 연구에서는 환경평가등급 재평가에 대한 시행배경과 내용을 재평가가 시행되기 이전과 이후를 비교하여 확인하였다. 다음으로 환경평가등급 재평가가 이루어진 2014년을 기준으로 서울시 개발제한구역 환경평가등급을 1999년∼2014년, 2014년∼2019년으로 구분하여 그 변화를 분석하였다. 1999년∼2014년에는 1-2등급지의 경우 대부분 증가 양상을, 3-5등급지의 경우는 감소추세가 두드러진 것을 알 수 있었다. 그러나 개발제한구역 환경평가등급 재평가 이후인 2014년∼2019년에는 반대로 2등급지의 뚜렷한 감소와 3등급지의 증가 양상이 두드러지게 나타났음을 확인하였다.The green belt in Korea introduced the Environmental Assessment System between 1998 and 1999 and conducted reasonable adjustment for the lifting of the green belt. The re-evaluation of environmental assessment grade was conducted between 2014 and 2015, and the possibility of changes in the environmental assessment grade of green belt was appeared. Therefore, in this study, the process of designation of green belt in the Seoul metropolitan area was first examined, and the background and what has been discussed during the re-evaluation of environmental assessment grades was verified by comparing before and after the re-evaluation. Next, based on 2014, when the environmental assessment grade was re-evaluated, the changes were analyzed by dividing the green belt’s environmental assessment grades of the Seoul Metropolitan Government into two periods, 1999-2014 and 2014-2019. While most of the 1st and 2nd grade areas increased between 1999 and 2014, the decline in the 3rd and 5th grade areas was noticeable. However, it was confirmed that, there was a marked decrease in the number of 2nd grade areas and an increase in 3rd grade areas between 2014 and 2019, after the revaluation of environmental assessment grades in green belt.