The present technology relates to: an information processing device that enables a more advanced user experience to be obtained; and an information processing method. Provided is an information processing device comprising a control unit that performs control in which, when displaying in a common coordinate system a 2D video provided by a first platform and a 3D video provided by a second platform, if the 3D video overlaps the 2D video depending on a viewpoint of a user using an apparatus corresponding to the second platform, then the 2D video is displayed in which a shadow area, corresponding to a shadow of an object included in the 3D video where a position corresponding to the apparatus is virtually treated as a light source, is represented in a predetermined display form. The present technology can be utilized in, for example, a system that presents content shared by a projector and a eyeglasses-type device.