In order to solve the inadaptability of Augmented Reality (AR) application system in universality and integration, and meet the practical requirements of aircraft assembly, this paper presents a new Aircraft Assembly AR Intelligent Pilot System (A3-IPSAR). Firstly, two key technologies, universal AR assembly instructions based on dynamic operation description and integrated operation pilot based on continuous operation state, are studied. Secondly, an AR intelligent pilot system is constructed for aircraft assembly operation. Finally, the system is applied to pipeline assembly of aircraft hydraulic system in laboratory environment. It is preliminarily realized that the real-time pilot and intelligent inspection applied in the assembly process of hydraulic pipelines are feasible.