A device and a method for managing electronic facilities of buildings. The device may include one or more interface elements for connecting the device to one or more electronic facilities of a building, a connection element for the connection of a portable storage device, and a control unit for reading files from the portable storage device, in which the reading of the files from the portable storage device is based on cryptography techniques, and in which the control unit is adapted to operate the electronic facilities by means of the interface elements on the basis of the result of the reading of the files from the portable storage device. The device according to the present disclosure enables a user to manage various types of electronic facilities of buildings simultaneously in a simple manner and by using a single portable storage device.