Cross-physical isolation data transparent transmission system and method between intranet and extranet

The invention relates to a cross-physical isolation data transparent transmission system between an intranet and an extranet. The system comprises a first enterprise service bus and a second enterprise service bus which are respectively arranged on the two sides of physical isolation, wherein a first safety data transmission adapter and a second safety data transmission adapter are respectively deployed on the first and second enterprise service buses, the physical isolation is arranged between gateways of the intranet and the extranet for performing network safety area isolation, the first and second enterprise service buses are used for respectively providing calling interfaces and simultaneously communicating with the physical isolation, and the first and second safety data transmission adapters are respectively responsible for safety certification and calibration of integrity and effectiveness of data of the intranet and the extranet. The invention further relates to a cross-physical isolation data transparent transmission method of the system. Improvement of data transmission can be performed under a physical isolation environment through the system and the method, the difficulty in transformation and the workload of the service system can be simplified, and the safety in data transmission can be further enhanced through the safety data transmission adapters.