The present embodiment is an information processing device adapted to a non-contact user interface. The information processing device includes a display control unit configured to perform control such that a first screen is displayed on a display, a feature recognition unit configured to recognize a feature related to a specific part of a user in a spatial coordinate system, a mapping unit configured to specify a position on the first screen, the position corresponding to a position of the specific part in the spatial coordinate system, according to a mapping algorithm on the basis of the feature, an input operation specifying unit configured to specify an input operation on the basis of content of the first screen and the position on the first screen, and a processing execution unit configured to execute processing on the basis of the input operation. The mapping unit causes a reference trajectory to be displayed on the first screen under the control of the display control unit, and determines an optimal mapping algorithm on the basis of a user trajectory according to a motion of the user with respect to the reference trajectory.