PURPOSE: A process for preparing synthetic food containing medicinal herbs, seaweeds, plants and other healthful materials is provided, which synthetic food is useful for improving health of old people and children, for reducing weight of overweight people, and for increasing immunity. CONSTITUTION: The process for preparing synthetic food containing medicinal herbs, seaweeds, plants and other healthful materials comprises the steps of: extracting the healthful materials including medicinal herbs, seaweeds, healthful plants and other healthful materials listed in annexed papers 1 to 23 to prepare 140 kg of healthful material juice; mixing 140 kg of healthful material juice with 100 kg of a mixture of Japanese apricot(maesil), ginger, grape, pear, apple, banana, pine apple, melon, watermelon, persimmon, apricot, peach and plum in the predetermined ratio, and 188 kg of grains; naturally fermenting the mixture at 5 to 38 deg. C for 1 to 8 months to produce 320 kg of healthful materials; mixing 320 kg of healthfu
