A full-flow intelligent diagnosis and optimized operation system for an industrial furnace is characterized by comprising a full-flow intelligent detection module, a full-flow digital twinning module,an intelligent diagnosis and analysis module, an intelligent decision control module and an intelligent control execution module. In the full-flow intelligent sensing, full-flow digital twinning, intelligent analysis and diagnosis, intelligent decision making and smart decision making, full-flow intelligent sensing and feedback overall circulation closed-loop process, on one hand, continuous self-analysis and self-diagnosis are carried out on continuously increased and accumulated data, and on the other hand, continuous self-learning and self-optimization are carried out by means of digital twinning and intelligent analysis and diagnosis, and a production operation GPS navigation system is established to realize self-tracking, self-optimization and self-rectification optimization of the full-flow production process. Therefore, the intelligent system functions of self-analysis, self-learning, self-diagnosis, self-recovery, self-management and self-optimization are integrally realized.