Abstract: A device and a method are provided for analyzing the behavior of a subject moving in an operational environment during a mission, including: synchronized acquisition of a plurality of raw data relating to the subject, to the operational environment and to the mission; on-the-fly cross-processing of the acquired raw data; and real-time generation of processed data from the cross-processing operations, providing instantaneous information about the state and the behavior of the subject; the device is characterized in that all or some of the steps may be implemented so as to activate various operating modes of analyzing and monitoring the behavior of the subject.