Abstract: Process and system for programmed control of a home and building automation system, for saving energy and improving comfort, with the process being performed by means of software and presence and activity monitoring sensors. The software includes first adaptive algorithms controlled by signals from the presence and activity monitoring sensors, for continuously detecting and storing systematic and stochastic behavior of at least one person in a room and over several rooms, and including second modifiable deterministic algorithms for adapting and triggering actuators of installations or groups of installations. The algorithms are combined with external parameters into a third algorithm to optimize the automation system as a whole and to adjust the first and second algorithms by means of feedback.