PURPOSE: To easily obtain the information required for the health management in a short time by providing a fundamental data base part for obtaining the fundamental quantity, etc., of a calorie to be ingested, an ingestion calorie data base part, and a central processing part.

CONSTITUTION: To a fundamental data base part 2, fundamental data for calculating a necessary calorie, etc., of a unit time of a person to be decided are inputted, and a calorie calculation data base part 3 stores calorie values corresponding to this fundamental data and an operator inputs age, sex distinction, height, weight, etc., by an input means. In the fundamental data base part 2, stoutness degree data corresponding to these information are inputted in advance, and by this data, a central processing part 1 calculates the degree 4 of stoutness of an object person, and displays it. Subsequently, the necessary calorie quantity corresponding to fundamental data of a specific person is calculated by using the calorie calculation data 3 and displayed as the necessary calorie quantity of that day.