The present disclosure relates to an information processing device and an information processing method that are capable of estimating the self-position by accurately and continuously estimating the self-movement. The information processing device according to an aspect of the present disclosure includes a downward imaging section and a movement estimation section. The downward imaging section is disposed on the bottom of a moving object traveling on a road surface and captures an image of the road surface. The movement estimation section estimates the movement of the moving object in accordance with a plurality of images representing the road surface and captured at different time points by the downward imaging section. The present disclosure can be applied, for example, to a position sensor mounted in an automobile.