Provided is a simple method for drying food and a drying device that can maintain color, scent, and flavor of the food without deteriorating original nutrition value of the food and prevent deterioration of the food due to reproduction of bacteria and food produced by such a method and a device with respect to agricultural product such as grains, beans, potatoes, vegetables, mountain vegetables, mushrooms, nuts, fruits, and herbs or marine product such as seaweeds and seafood. Food of agricultural product or marine product is placed in a dry warehouse for drying the food, upper gas and lower gas in the dry warehouse are circulated by a duct fan provided to the side in the dry warehouse, and the food is dehumidified and dried under the atmospheric pressure and at the temperature of 60° C. or lower and the relative humidity of 60% or less to obtain dried food.
