PROBLEM TO BE SOLVED: To provide a control method and a control device in which a sufficient amount of cold air in a freezer chamber is supplied to a cooking/chilling chamber, and foods after cooked are rapidly cooled, and thereafter they are stored in cold to be able to be fresh over along time. SOLUTION: A cooking /chilling chamber 19 includes a first cold air suction hole 22 coupled with a first cold air flow passage 15 from a freezing chamber 11 formed at any position on an upper surface and a second cold air suction hole 24 communicating with a second cold air flow passage 16 extended to a refrigeration chamber 12 from the freezing chamber 11 formed on a one side surface close to upper surface. A cooking/chilling cold air fan 23 is disposed at the first cold air suction hole 22 and forcedly introduces cold air in the freezing chamber 11 to the cooking chilling chamber 19. A cooking/chilling circulation fan 20 is disposed at the second cold air suction hole, and forcibly circulates the cold air introduced into the chamber 19. A cooking/chilling operation switch issues an instruction of switching on and off operation of a cooking/chilling system, and drives the cooking/chilling cold air fan 23 and the cooking/chilling and the cooking/chilling circulation fan 20 with an output signal from the operation switch.