The present technology relates to an information processing device, an information processing method, that facilitate comparisons between insurances. The information processing device includes an acquisition unit that acquires an output from one sensor or outputs from a plurality of sensors different from each other as behavior-monitoring data items of a user, and a diagnosis-result prediction unit that predicts a diagnosis result about one insurance or diagnosis results about a plurality of insurances for the user on the basis of a prediction model calculated in advance by learning for the one insurance or each of the plurality of insurances and on the basis of the behavior-monitoring data items. The present technology is applicable to comparison systems.