A method for producing mineral water through data computing by a microprocessor unit, comprising: inputting a user's basic data via an input interface to obtain data about human mineral intake and data about average mineral intake from food; selecting a water supply area via the input interface to obtain data about mineral intake from daily water intake; selecting the user's e ating habit and a physical/mental condition v ia the input interface to obtain a multiplication factor for calculating required mineral intake; inputting the user's body weight via the input interface, and the microprocessor unit calculating mineral intake based on the above input and selected data; setting a daily water intake via the input interface, and the microprocessor unit calculating a daily mineral supplement based on the set daily water intake; and outputting mineral water containing the calculated daily mineral supplement, wherein the user's mineral intake is calculated based on the input data about the user's body weight and the user's daily mineral supplement from the user-set daily water intake is calculated from the following formula: M = a - b - c x d x e / standard reference weight where, a is the recommended human mineral intake selected according to the input sex and age; b is the average mineral intake from food calculated based on the input sex and age; c is the mineral intake from daily water intake calculated based on an average quality of water supplied by the selected water supply area; d is a multiplication factor for calculating the user's mineral intake according to the selected personal eating habit and physical/mental condition; and e is the input user's body weight for calculating the mineral intake. inputting a user's basic data via an input interface to obtain data about human mineral intake and data about average mineral intake from food; selecting a water supply area via the input interface to obtain data about mineral intake from daily water intake; selecting the user's e ating habit and a physical/mental condition v ia the input interface to obtain a multiplication factor for calculating required mineral intake; inputting the user's body weight via the input interface, and the microprocessor unit calculating mineral intake based on the above input and selected data; setting a daily water intake via the input interface, and the microprocessor unit calculating a daily mineral supplement based on the set daily water intake; and outputting mineral water containing the calculated daily mineral supplement, wherein the user's mineral intake is calculated based on the input data about the user's body weight and the user's daily mineral supplement from the user-set daily water intake is calculated from the following formula: M = a - b - c x d x e / standard reference weight where, a is the recommended human mineral intake selected according to the input sex and age; b is the average mineral intake from food calculated based on the input sex and age; c is the mineral intake from daily water intake calculated based on an average quality of water supplied by the selected water supply area; d is a multiplication factor for calculating the user's mineral intake according to the selected personal eating habit and physical/mental condition; and e is the input user's body weight for calculating the mineral intake. a is the recommended human mineral intake selected according to the input sex and age; b is the average mineral intake from food calculated based on the input sex and age; c is the mineral intake from daily water intake calculated based on an average quality of water supplied by the selected water supply area; d is a multiplication factor for calculating the user's mineral intake according to the selected personal eating habit and physical/mental condition; and e is the input user's body weight for calculating the mineral intake.