Interlocking device, interlocking system and control method thereof

The invention relates to an interlocking device, an interlocking system and a control method thereof, the interlocking device comprises at least one lock structure and further comprises a linkage structure matched with the lock structure, the linkage structure controls the lock structure to unlock, and the adjacent linkage structures are connected through a connecting assembly. The linkage structures are arranged between the lock structures, the linkage structures control the lock structures to be unlocked, the adjacent linkage structures are connected through the connecting assemblies, and when the control system detects power failure or faults, the linkage devices are manually pressed down to enable all the lock structures connected together to be unlocked at the same time, so that the lock structures are unlocked at the same time. Therefore, the emergency door opening and closing effect is achieved, and inconvenience caused by the fact that power failure or system faults affect storage and taking of articl