A system for monitoring and controlling a set of power users, in particular household appliances, which users (U) are connected to a first communication network (RE) through appropriate interfacing means (N) for the exchange of information and/or instructions, where transmitter/receiver means (MC) connected to said first communication network (RE) are provided for establishing a communication channel to a second remote network (IN) and/or remote terminal (TC). According to the present invention, said transmitter/receiver means (MC) are associated to one of said electric users (LB) and share one of the interfacing means (N) associated to said user (LB).