A method for controlling door access with improved safety includes connecting door locks with a control device. Through physical and electrical connection by an emergency control unit, the control device can set all door locks to a locking state and can revoke unlocking authority of all door locks. When the emergency control unit is physically disconnected from the control device, all door locks can operate independently in locking and unlocking. Furthermore, the control device is connected to at least one gunshot detection device and/or at least one fire detection device. When a gunshot event and/or a fire occurs, the door locks near the gunshot location or the fire can be rapidly locked to reduce the movement speed of the gunman and/or the spreading speed of the fire.