The invention relates to an urban agglomeration height space information and contour line extraction method. the method is characterized in that , for extraction of urban buildings, remote sensing data and social perception data are fused, a high/low density building area of a plot scale is established, and the extraction of the urban buildings is realized by combining a multi-view difference feature map; for extraction of urban building heights, dense point clouds are generated by matching every two of forward-looking, backward-looking and front images of a resource No.3, a digital surface model is solved by adopting a TIN linear interpolation method, the thought of point cloud classification is introduced, accurate ground points are obtained, and a digital elevation model is established.According to the invention, the forward-looking, backward-looking and front images of the resource No.3 are fully utilized, and a system framework for extracting urban building information and building height information is innovatively constructed, models of an urban contour line, an urban undulation degree and an urban growth height are obtained on the basis of the system framework, and an evolution pattern of urban transverse area expansion and longitudinal height increase is revealed.