Abstract: Provided is a containing system which includes a first frame structure, a plurality of first discharge units in the first frame structure, extending in a first direction, and fixedly coupled to the first frame structure in a second direction perpendicular to the first direction, a second frame structure detachably coupled to the first frame structure in the first direction, a first containing unit fixedly supported on the second frame structure and spaced apart from the first frame structure, a second containing unit connected to the first containing unit and spaced apart from the first frame structure, a plurality of second discharge units connected to the second containing unit, aligned with the first discharge units in the first direction, and spaced apart from the first discharge units, and a pressure control unit connected to the first containing unit and controlling a first air pressure in the first containing unit to counterbalance a second air pressure outside the first containing unit.