It is a new aspect of engineering science that uses augmented reality and collaboration technology to aid the design and maintenance of large equipment. To meet the requirement of the design and manufacture of commercial aircraft in China, CAR-CA(collaborative augmented reality for commercial aircraft design & maintenance) is under development now to aid the cockpit design and training of components disassembly and assembly. This paper introduced the engineering and technology progress of CAR-CA, including the system architecture, system components, technology researches and system application prospect, etc.