Abstract: A method for deciding items and parameters for selection of health guidance receivers, and a method for readjusting the method. To that end, there is provided a health service support system including a routine for computing a health guidance effect on a time-series basis by the category obtained by combining the items and dividing value candidate with the items and dividing value candidate on the basis of the health checkup data units, the health guidance data units, and the medical fee receipt data units, a routine for computing a feature quantity, in the form of an approximate straight line, from the time-series health guidance effect, a routine for selecting at least one item and parameter from the items and dividing value candidates, on the basis of the feature quantity, and a routine for creating a health guidance model associated with the order of priority in health guidance, using the items and parameters, as selected.