The invention provides a student portrait construction method and
system based on a
large model agent. The method comprises the steps of collecting
learning behavior data of students; generating an expert cognitive path map of each subject based on the
large model, and constructing a standard path
database containing typical tasks; performing
semantic alignment on the student path and a standard path, and calculating a cognitive residual
feature vector including step redundancy, a
path deviation angle and concept
confusion frequency; calculating an attention weight matrix by using a bidirectional Transform model, positioning a cognitive interruption point in combination with a residual feature, and generating a sticking point interpretation map containing knowledge fault positioning and repair suggestions; generating a dynamic
cognitive map and a strategy evolution tree; and generating a student cognitive portrait containing a sticking point interpretation map, a
cognitive map and a strategy evolution tree. According to the method, the student
cognition portrait containing the sticking point interpretation map, the
cognition map and the strategy evolution tree is generated, the student
cognition features, learning obstacles and strategy preferences are comprehensively described, and a visual decision basis is provided for teaching intervention.