The invention relates to a system and a method for localizing an object of interest in a monitored space. The system comprises a plurality of capacitive sensors (2) for sensing changes in the status of a space, adapted to electrically interact in a contactless way with a ground surface so as to provide a capacitance varying on the basis of such changes, and adapted to detect at least a time evolution of said capacitance and to produce a capacitance- depending signal, a filtering unit (25) configured for reducing the noise level in said time evolution of such capacitance by filtering the capacitance-depending signal provided by the capacitive sensors (2), so that corresponding filtered signals are produced, and a central device in signal communication with said capacitive sensors (2). The central device is configured for acquiring the filtered signals of each capacitive sensor (2), and for determining the position of the object of interest inside said space by inferring at least a distance of said object on the basis of the filtered signals acquired from at least one of the sensors (2) detecting said object, and by combining said at least a distance with positional data defining the positions of said plurality of capacitive sensors (2) in the monitored space.
