ETOPS(Extended Operations) is widely used in the flight for long range, over the water and polar region. This paper reviews the progress of ETOPS regulation and the ETOPS applications , and from perspective of 〖JP3〗airplane design ,several key points to focus on the ETOPS design are also presented. The connotation of ETOPS design is reflected more directly through the review of multiple aspects, and it can be used as a guide for ETOPS design.