To control convection for heat exchanging ventilation in a snow chamber and a cargo chamber by arranging the snow chamber and the cargo chamber surrounded by a thermally insulated wall and disposing a door structure partition at an arbitrary position in the space of the snow chamber and the cargo chamber.

A snow chamber A is provided with a thermally insulated door E for snow supply while a cargo chamber B is provided with a thermally insulated door F for delivering an article to be stored and a vestibule C is provided with a door H for loading/unloading work. A door structure partition G is disposed at an arbitrary spatial position of the snow chamber A and the cargo chamber B surrounded by a thermally insulated wall D. Snow is collected in the snow chamber A in the early stage of snow supply work and subsequently in the vicinity of the thermally insulated door E for snow supply by means of a vehicle or a rotary. At the same time, snow is stacked sequentially from the rear in the warehouse up to the ceiling height using a rotary thus controlling convection of heat exchanging ventilation in the snow chamber A and the cargo chamber B.