The aircraft assembly components are typical for large size and complex shape, which makes it need large data for outline inspection. The contradiction between the measuring accuracy and efficiency of the existing single measuring device or measurement field is outstanding. Thus, the digital combined measurement system, including a laser tracker,an articulated arm measuring machine and photogrammetric system, is constructed. Based on the coordinate transformation, the measurement information of multiple stations is unified into the global coordinate system. The measurement results of the component shape are obtained by comparing the measurement data model with the theoretical model, improving the measurement efficiency of the profile surface under the condition of ensuring the measurement accuracy. Taking the assurance of shape accuracy of the flap assembly process for an example, the validity and correctness of the proposed method are verified.