To facilitate keeping of quality of each of goods by a method wherein a temperature state within a main body is applied as a predetermined storing state and the temperature state in the main body is controlled automatically in such a way that it may become the most-suitable storing state corresponding to the item of stored goods in response to an output signal attained from a selection switch when an automatic operation is selected.

In the case that an automatic operation is selected by a changing-over switch 12 and any one of first to fourth selection buttons 14-1, 14-2, 14-3 and 14-4 in the selection switch 14 is selected when the automatic operation is selected, a temperature state in the main body 4 is automatically controlled in such a way that the state may become the most-suitable storing state in response to the item of the stored goods in reference to an output signal from any one of the first to fourth selection buttons 14-1, 14-2, 14-3 and 14-4. As described above, even a person having no knowledge about the storing can easily set it through the first to fourth selection buttons 14-1, 14-2, 14-3 and 14-4 of the selection switch 14, its convenience in use can be attained and at the same time a temperature state in the main body 4 can be controlled to the most-suitable storing state in response to the item.