An intelligence-defined optical tunnel network system, comprising: a plurality of pods (P1, P2, P3, P4), any one of the pods comprising a plurality of optical add-drop sub-systems (200, 200a~200e), the optical add-drop sub-systems configured to perform data transmission, respectively, through a plurality of Top-of-Rack switches (ToR, ToRa-ToRc) between a corresponding plurality of servers, wherein any one of the optical add-drop sub-systems comprises: a first transmission module (210, 210a~210e), configured to perform data transmission at a first frequency band, the first transmission module of any one of the optical add-drop sub-systems (200, 200a~200e) connected to the first transmission module (210, 210a~210e) of adjacent ones of the optical add-drop sub-systems (200, 200a~200e) to form a first transmission ring (Ring1); and a second transmission module (220, 220a~220e), configured to perform data transmission at a second frequency band different from the first frequency band, the second transmission module (220, 220a~220e) of any one of the optical add-drop sub-systems (200, 200a~200e) connected to the second transmission module (220, 220a~220e) of the adjacent ones of the optical add-drop sub-systems (200, 200a~200e) to form a second transmission ring (Ring2), characterized in that the first transmission modules of the optical add-drop sub-systems couple to a first optical switch interconnect sub-system through a corresponding plurality of first longitudinal ports respectively, and the second transmission modules of the optical add-drop sub-systems couple to a second optical switch interconnect sub-system adjacent to the first optical switch interconnect sub-system through a corresponding plurality of second longitudinal ports, respectively. a plurality of pods (P1, P2, P3, P4), any one of the pods comprising a plurality of optical add-drop sub-systems (200, 200a~200e), the optical add-drop sub-systems configured to perform data transmission, respectively, through a plurality of Top-of-Rack switches (ToR, ToRa-ToRc) between a corresponding plurality of servers, wherein any one of the optical add-drop sub-systems comprises: a first transmission module (210, 210a~210e), configured to perform data transmission at a first frequency band, the first transmission module of any one of the optical add-drop sub-systems (200, 200a~200e) connected to the first transmission module (210, 210a~210e) of adjacent ones of the optical add-drop sub-systems (200, 200a~200e) to form a first transmission ring (Ring1); and a second transmission module (220, 220a~220e), configured to perform data transmission at a second frequency band different from the first frequency band, the second transmission module (220, 220a~220e) of any one of the optical add-drop sub-systems (200, 200a~200e) connected to the second transmission module (220, 220a~220e) of the adjacent ones of the optical add-drop sub-systems (200, 200a~200e) to form a second transmission ring (Ring2), a first transmission module (210, 210a~210e), configured to perform data transmission at a first frequency band, the first transmission module of any one of the optical add-drop sub-systems (200, 200a~200e) connected to the first transmission module (210, 210a~210e) of adjacent ones of the optical add-drop sub-systems (200, 200a~200e) to form a first transmission ring (Ring1); and a second transmission module (220, 220a~220e), configured to perform data transmission at a second frequency band different from the first frequency band, the second transmission module (220, 220a~220e) of any one of the optical add-drop sub-systems (200, 200a~200e) connected to the second transmission module (220, 220a~220e) of the adjacent ones of the optical add-drop sub-systems (200, 200a~200e) to form a second transmission ring (Ring2), characterized in that the first transmission modules of the optical add-drop sub-systems couple to a first optical switch interconnect sub-system through a corresponding plurality of first longitudinal ports respectively, and the second transmission modules of the optical add-drop sub-systems couple to a second optical switch interconnect sub-system adjacent to the first optical switch interconnect sub-system through a corresponding plurality of second longitudinal ports, respectively.