A survey of system safety technique of commercial aircraft

System safety technique plays an important role in commercial aircraft´s design and research; it greatly influences safety and airworthiness as well. According to the development of foreign system safety, system safety concepts are explicitly defined, and its research topics and key techniques are analyzed in the whole life cycle, including human factor, organization, economic affordability, etc. Problems existing in domestic system safety field are summarized. Furthermore, advices on how to implement system safety work are put forward.