Door lock, door lock system and control method of door lock system

The invention belongs to the technical field of electronic door locks, and particularly relates to a door lock, a door lock system and a control method of the door lock system. The electronic door lock comprises a door lock body and further comprises an executing mechanism connected with the door lock body and used for achieving locking or unlocking of the door lock body, a control module electrically connected with the executing mechanism and used for controlling the action of the executing mechanism and an information acquisition module electrically connected with the control module and usedfor acquiring a locking or unlocking request of a user and transmitting the locking or unlocking request to the control module in order to make the control module control the executing mechanism to realize locking or unlocking. The door lock provided by the embodiment of the invention can drive the door lock body to rotate through the executing mechanism, can be applied to an existing door lock body to realize transforma