1. Method for the monitoring of an environment, comprising the steps of: a) defining and storing in a memory programs for processing, in real-time, data obtained from the observation of objects by one or more pairs of optical and/or thermal imagers, relatively positioned along a common vertical line, for identifying said objects and determining whether they are dangerous; b) determining and storing parameters according to which the observation of the controlled space is effected; c) carrying out photographic observation of the controlled space or sections thereof, according to the aforesaid observation parameters; and d) jointly processing the digital data representing said optical and thermal photographs, to determine whether possible dangerous objects have been detected, and if so, classifying said objects according to the stored danger parameters.