This paper presents the definition of intelligent aircraft and the characteristics of intelligent aircraft, whose characteristics include situation sense, machine learning, autonomous control and planning, behavior decision, natural humanmachine interface, and full maintenance based airground. Based on the characteristics of intelligent aircraft, this paper presents intelligent driving technology for flight crew, intelligent cabin technology for passengers and intelligent maintenance technology for maintainer. Meanwhile, this paper introduces the intelligent driving technology, intelligent cabin technology and intelligent maintenance technology. This paper mainly introduces the key technology such as PBN, ADSB in detail to support intelligent driving technology. It has an important guiding role and research significance in future design of intelligent aircraft.