An electronic control system for drilling devices, includes at least one pair of data-processing units (2a, 2b); a plurality of data-exchange lines, connected to the data-processing units (2a, 2b) for transmission of signals from and to control devices (4a-4c) of the drilling device; and accessories (5, 9) proper to the drilling device. Each of the data-processing units (2a, 2b) is redundant by the others with one and the same level of hierarchy, and all the data-processing units (2a, 2b) are connected to all the control devices (4a-4c) and to the accessories (5, 9) proper to the drilling device through the electronic data-exchange lines that are redundant in a number equal to the multiplicity of the data-processing units (2a, 2b).