Abstract: Provided is a method for assessing a correlation degree and an influence degree between a health degree in a health domain of concern and each preventive interventional action, based on biological information acquired in a time-series manner. The method comprises: acquiring biological information of an individual in a time-series manner; performing, based on the acquired biological information, an assessment of a health degree of the individual in a time-series manner; acquiring an intervention amount of each of one or more preventive interventional actions in a time-series manner; deriving a correlation degree and an influence degree between the time-series intervention amount of each of the one or more preventive interventional actions and the time-series health degree of the individual; and determining, as a relevant preventive interventional action, a preventive interventional action whose correlation degree is a given value or more, among the one or more preventive interventional actions.