The present disclosure provides a parking lot free parking space predicting method and apparatus etc., and relates to the field of artificial intelligence. The method comprises: building a parking lot association graph and an information propagation graph for parking lots in a region to be processed, each junction in the graphs representing a parking lot, and connecting parking lots meeting a predetermined condition through edges; as for any parking lot i without a real-time sensor, determining local space correlation information of parking lot i according to environment context features of the parking lot i and neighboring parking lots which are in the parking lot association graph and connected to the parking lot i through edges; determining free parking space estimation information of the parking lot i according to free parking space information of neighboring parking lots with real-time sensors in the information propagation graph; determining time correlation information of the parking lot i according to the determined two kinds of information, and predicting future free parking space information of the parking lot i according to the information. The solution of the present disclosure may be applied to improve the accuracy of the prediction result.
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