Intelligent variant aircraft is one of the important development directions of advanced aircraft in the future, and it is also an innovative research frontier in the aerospace field, with potential important value in the future civil and military fields. The overall performance advantages of intelligent variant aircraft are mainly reflected in aspects such as cross speed domain and cross medium. The width of the aircraft"s airspace and speed domain determines the size need of the variant. Especially the transonic variant aircraft, which has good takeoff and landing, acceleration performance, and supersonic flight capabilities can better perform tasks such as economic cruising, wide-area monitoring, rapid arrival, and successful breakthrough. Combined with intelligent OODA autonomous closed-loop, it is expected to become an important intelligent aircraft unit/platform in the future. In this paper, the research progress and future key technologies of intelligent variant aircraft are analyzed, and the concept and application prospect of a new large-scale variant aircraft are introduced and prospected. The above analysis can be used as reference for related research fields.