This estimation system is provided with: a feature amount extraction unit that extracts multiple feature amounts relating to multiple senses from stimulation information pertaining to a subject; a first conversion unit that respectively converts the multiple feature amounts, extracted from the stimulation information pertaining to the subject by the feature amount extraction unit, to multiple corresponding pieces of first brain information relating to the multiple senses on the basis of first correspondence information indicating the correspondence between the feature amounts relating to the multiple senses and the first brain information pieces; a second conversion unit that uses second correspondence information indicating the correspondence between the first brain information and at least one piece of second brain information corresponding to the internal state of a reference subject to convert the multiple first brain information pieces obtained through conversion by the first conversion unit to second brain information; and an estimation unit for estimating the internal state corresponding to the stimulation information pertaining to the subject using the second brain information obtained through conversion by the second conversion unit.
ESTIMATION SYSTEM AND ESTIMATION METHOD