Disclosed is a survival analysis system for determining an estimated time until an event occurs on the basis of a group of cases each including at least one attribute value indicating a feature value of a case and information on the measured actual time until an event occurs. The survival analysis system includes: an estimator creating section for creating an estimator for estimating whether or not an event occurs according to the attributes of the group of cases for each actual time; an estimator selecting section for judging whether or not the estimator meets a predetermined selection condition and to selecting an estimator used for calculating the estimated time; and a time calculating section for calculating the estimated time by using the estimator selected by the estimator selecting section.