Abstract: The present invention provides a door access management method applicable to a building. The building includes a plurality of areas. The door access management method includes setting access information of an access card, the access information marking accessible entrances of the access card in the building; arranging an electronic lock on a door for controlling access of an entrance of a corresponding area in the building; the electronic lock storing information of the entrance controlled by the electronic lock; the electronic lock sensing the access card for receiving the access information of the access card; the electronic lock comparing the access information with the information of the entrance controlled by the electronic lock; and unlocking the electronic lock when an accessible entrance marked by the access information corresponds to the information of the entrance controlled by the electronic lock.