To prevent crystal of ice of moisture in material to be cooled from being increased in size to the utmost to destroy a cell membrane in preserving material to be cooled such as food at a low temperature (a freezing temperature or lower).

This cooling storehouse includes a cluster ramifying device 31 for ramifying cluster of moisture in material 28 to be cooled, wherein the cluster segmentating device is operated in a temperature zone higher than the freezing temperature to segment the cluster in the material to be cooled, then the cluster segmentating device is stopped, and the temperature of the material to be cooled is lower below the freezing temperature, and subsequently stimulation such as vibration is applied to quickly freeze the material to be cooled.

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