Traffic flow prediction method, device and system

The invention discloses a traffic flow prediction method, device and system. The method comprises the steps that a track transfer matrix, historical track data and a weighted road adjacency matrix in a preset road network range are obtained, and the weighted road adjacency matrix is used for representing the adjacency relation between roads in the preset road network range; a traffic conversion state is determined according to the trajectory transfer matrix and the historical trajectory data, and the traffic conversion state is used for representing the traffic flow corresponding to the traffic flow after each time of trajectory transfer when the traffic flow is subjected to multiple times of trajectory transfer; a neighborhood traffic state is determined according to the weighted road adjacency matrix and the historical trajectory data, and the neighborhood traffic state is used for representing the traffic flow of the adjacent road sections; and predicting future traffic flow according to the traffic conver