An information processing device includes: an image acquirer configured to acquire a shot image of a user from an imaging device; a registered user information holder configured to hold face identification data of a registered user; a face authentication section configured to execute authentication processing of a face image in the shot image by using the face identification data held in the registered user information holder; a shooting condition controller configured to adjust a shooting condition to bring a characteristic of the face image close to a characteristic of a face image of an acquisition source of the face identification data and make the imaging device perform shooting in order to improve an authentication result in the face authentication section; and an information processing section configured to execute information processing on the basis of an authentication result of a face image obtained by adjustment.