An edge computing-based method for fine determination of an urban traffic state includes the following steps: preprocessing lane-level data collected by edge nodes; dividing a complete road segment; computing an average delay per vehicle of a lane by using the edge nodes; inputting the preprocessed and computed data into a fuzzy logic model to determine a lane-level traffic state of an approach region; and based on the characteristic that edge nodes at the intersections can be interconnected, linking upstream and downstream intersection information to compute an average travel speed of a remaining road segment, and determining a traffic state of the remaining road segment.