There is provided an information processing device having an extraction unit that extracts data of a characteristic part concerning a variation of a movement of a subject from data that is obtained from a sensor attached to the subject and indicates the movement of the subject, an action estimation unit that estimates an action of the subject with reference to a storage unit that stores an action pattern of the subject, the action corresponding to the extracted data of the characteristic part, and a form estimation unit that estimates a form of an action of the subject, the form corresponding to the extracted data of the characteristic part.
