Abstract: A method and system for predicting a road network congestion propagation situation based on an epidemic model is provided. The method includes: obtaining road network data at a current time point; classifying the road network data based on road section types to obtain a road section set of each road section type; predicting a road network congestion situation at each time point within a predetermined time period based on the road section set of each road section type and the epidemic model to obtain road network prediction data; obtaining road network congestion propagation evaluation indexes, comprising a propagation scale, propagation duration, and a propagation velocity; and analyzing the road network prediction data based on the road network congestion propagation evaluation indexes to obtain the road network congestion propagation situation at the current time point.