The present invention relates to a method and system for providing cosmetics customized for an individual customer, and more particularly, to a method and system for providing cosmetics customized for an individual customer, wherein customized cosmetics appropriate for skin condition or scalp and hair condition of the customer are produced using diagnostic data on the skin condition or scalp and hair condition of the customer and provided to the customer to thereby enhance customer's feeling of satisfaction. According to the present invention, there is provided a method for providing customized cosmetics appropriate for an individual customer using a microprocessor having information on standard cosmetic material mixing ratios in accordance with age groups and skin conditions of consumers as a database.