In response to the pressing demands for high-precision and batch assembly of large-scale complex structures in next-generation aircraft, this study addresses key bottlenecks in traditional digital measurement, such as inefficient measurement field construction, poor multi-equipment coordination, and the absence of an integrated cooperative measurement platform. Research on multi-system cooperative precision measurement technology has been carried out. An uncertainty propagation model for large-scale measurement fields and an adaptive planning method were established, and a multi-mode benchmark transformation standard device was developed, significantly improving the accuracy of cooperative measurement field construction. A measurement planning technique based on streamlined modeling and task-equipment coordination was proposed, supporting automated generation and simulation optimization of multi-station and multi-task sequences. Furthermore, a multi-system cooperative precision measurement platform for large-scale complex structure assembly was developed, integrating multi-equipment control, measurement planning, data management, and analysis. This platform achieves closed-loop control over the assembly measurement process encompassing "modeling–planning–measurement–analysis," leading to significant enhancements in both measurement accuracy and efficiency.