The present invention relates to a fermentation apparatus comprising a storage compartment which is formed with an accommodating space for storing food and at least one of a heating part and a cooling part to ferment the food in the storage compartment, further comprising a sensor to sense a fermentation level of the food; an input part comprising a memory button allowing to memorize the fermentation level in a state that the food is fermented to an extent that a user wants to memorize; and a controller to control operation of at least one of the heating part and the cooling part, and store a fermentation value from the sensor as a custom fermentation value if the memory button is selected. Thus, the present invention provides a fermentation apparatus for customizing a fermentation level and a method thereof, which memorizes a desired fermentation level and repeatedly provides food at a desired fermentation level by selecting a memorized fermentation level.