A lock structure for an electrical device is provided. The lock structure includes a rotatable fastener, a lock body, an operation device, and a housing. The lock body is disposed at least partially in the housing, connected with the operation device, and couples with a driving portion. When the lock body is in an unlocked state, the lock body allows the driving portion to move the rotatable fastener. Simultaneously, the operation device can move the driving portion to change the orientation of the rotatable fastener, resulting in the connection/detachment of the lock structure and the electronic device. When the lock body is in a locked state, movement of the driving portion is restricted and the operation device cannot directly or indirectly rotate the rotatable fastener, resulting in the secure connection of the lock structure and the electronic device.