An extracting method of extracting a beverage liquid from an extraction target includes a pressure reduction step of switching an interior of an extraction container in which the extraction target and a liquid are stored from a first air pressure to a second air pressure lower than the first air pressure, and an extraction step of extracting the beverage liquid from the extraction target. The first air pressure is an air pressure at which the liquid at a predetermined temperature does not boil, and the second air pressure is an air pressure at which the liquid that does not boil at the first air pressure boils. The switching from the first air pressure to the second air pressure is done by releasing the air pressure in the extraction container.