The invention provides a psychological crisis multi-stage joint control method and
system based on a psychological
large model, and aims to realize real-time monitoring, accurate evaluation and intelligent intervention of psychological states through a multi-
modal data fusion and
deep learning technology. The
system collects multi-source information such as texts, voices, videos, physiological signals and behavior data, performs cross-
modal analysis by using models such as Transform, LSTM and CNN, constructs personalized psychological portraits, and analyzes and predicts the psychological state change trend in combination with a
time sequence. According to the method, a psychological crisis dynamic grading model is adopted, the psychological state of a user is divided into a normal grade, a mild grade, a moderate grade and a severe grade, multi-grade intelligent intervention is provided based on different risk grades, and the multi-grade intelligent intervention comprises AI self-service adjustment,
psychological counseling matching, social support enhancement, emergency medical intervention and the like. The
psychological intervention strategy is optimized in combination with
reinforcement learning, the intervention mode is dynamically adjusted according to
user feedback, and individuation and adaptability are improved.