The overall thought to realize the hull welding process design technology system is introduced, the process model characteristic parameterization definition technology, process model characteristic parameter acquisition technology, process matching technology, operation post-processing technology, and execution adaptive adjustment technology are expounded, and the technologies are applied in the unit assembly and sub-assembly intelligent welding system, which effectively improves the hull welding quality and efficiency. The technology system can provide a process design thought for the subsequent similar hull welding.