Interestedly using optic-mechanical integration technology, assembly line combined with precision machine, pneumatics, computer and PLC (programmable logic controller), has advantage of reasonable construction, high degree of automatic, high detesting precision, stable working condition, matching with high-speed beats of on-line inspection. With function of data handing, storage, communication and being easily connected with enterprise network, it can well satisfy the requirement of information management. Thus it can better guarantee the quality of assembly, improving assembly efficiency, reducing number of workers and cutting the production cost.