Abstract: A method and device for remotely measuring, monitoring and controlling physical quantities over digital communication networks is provided. The measured quantities are grouped by energy end-uses or type of energy produced. The present patent describes the hardware and software used to perform these measurements, monitoring and control actions. The method and associated devices provide the means to sub-divide the building energy consumption by its end-uses or into cost centers, so as to determine the “specific energy consumption” of each cost center, in terms of kWh/produced unit, kWh/m2, kWh/employee, for example. The system comprises four hierarchically interconnected layers. The first layer includes all the equipments and technologies involved in data acquisition (or actuation) in the monitored building.