An intelligence-defined optical tunnel network system, comprising: a first tier network, comprising a plurality of pods (P1-P4), wherein any one of the pods comprises a plurality of optical add-drop sub-systems (200a-200e), the optical add-drop sub-systems being adapted to perform data transmission, through a plurality of top-of-rack switches, with a corresponding plurality of servers; and a second tier network, comprising a plurality of optical switch interconnect sub-systems (400a-400e), wherein any two of the optical switch interconnect sub-systems is adapted to transmit a corresponding lateral transmission optical signal between each other through a corresponding first line, wherein any two adjacent optical switch interconnect sub-systems of the optical switch interconnect sub-systems are coupled to the optical add-drop sub-systems of the same pod in the first tier network through a plurality of optical paths, characterized in that any one of the optical add-drop sub-systems (200a-200e) comprises: a first transmission module, configured to perform data transmission with a first frequency band; and a second transmission module, configured to perform data transmission with a second frequency band differed with the first frequency band, wherein the first transmission modules of the optical add-drop sub-systems in the same pod are coupled jointly to a first optical switch interconnect sub-system of the optical switch interconnect sub-systems through the corresponding optical path respectively, and the second transmission modules are coupled jointly to a second optical switch interconnect sub-system adjacent to the first optical switch interconnect sub-system in the optical switch interconnect sub-systems through the corresponding optical path respectively. a first tier network, comprising a plurality of pods (P1-P4), wherein any one of the pods comprises a plurality of optical add-drop sub-systems (200a-200e), the optical add-drop sub-systems being adapted to perform data transmission, through a plurality of top-of-rack switches, with a corresponding plurality of servers; and a second tier network, comprising a plurality of optical switch interconnect sub-systems (400a-400e), wherein any two of the optical switch interconnect sub-systems is adapted to transmit a corresponding lateral transmission optical signal between each other through a corresponding first line, wherein any two adjacent optical switch interconnect sub-systems of the optical switch interconnect sub-systems are coupled to the optical add-drop sub-systems of the same pod in the first tier network through a plurality of optical paths, characterized in that any one of the optical add-drop sub-systems (200a-200e) comprises: a first transmission module, configured to perform data transmission with a first frequency band; and a second transmission module, configured to perform data transmission with a second frequency band differed with the first frequency band, wherein the first transmission modules of the optical add-drop sub-systems in the same pod are coupled jointly to a first optical switch interconnect sub-system of the optical switch interconnect sub-systems through the corresponding optical path respectively, and the second transmission modules are coupled jointly to a second optical switch interconnect sub-system adjacent to the first optical switch interconnect sub-system in the optical switch interconnect sub-systems through the corresponding optical path respectively. a first transmission module, configured to perform data transmission with a first frequency band; and a second transmission module, configured to perform data transmission with a second frequency band differed with the first frequency band, wherein the first transmission modules of the optical add-drop sub-systems in the same pod are coupled jointly to a first optical switch interconnect sub-system of the optical switch interconnect sub-systems through the corresponding optical path respectively, and the second transmission modules are coupled jointly to a second optical switch interconnect sub-system adjacent to the first optical switch interconnect sub-system in the optical switch interconnect sub-systems through the corresponding optical path respectively.