In precision assembly processes across automotive, construction machinery, electronics, and other industries, the actual position of components is often affected by incoming part variation, fixture errors, and assembly tolerances. Fixed robot programs alone cannot consistently ensure assembly accuracy, while rigid positioning fixtures are difficult to adapt to flexible production with frequent product changeovers. The 3D Vision-Guided Precision Assembly Solution uses high-precision industrial 3D cameras to identify and measure target components, assembly holes, and other features. It acquires the actual position and pose deviation of the target and sends compensation results to the robot, enabling high-precision alignment, insertion, fitting, tightening, and other assembly operations. The solution improves assembly accuracy and product consistency, reduces rework, damage, and quality issues caused by assembly deviation, and enhances the automation level and repeatability of complex assembly processes.