Disclosed is a refrigerating and freezing device, including a cabinet defining at least one storage compartment, at least one cabinet door configured to respectively open and close the at least one storage compartment, a refrigerating system configured to provide cooling capacity to the at least one storage compartment, and a heating unit. The heating unit includes a cylinder body disposed in one storage compartment and provided with a pick-and-place opening, a door body configured to open and close the pick-and-place opening, and an electromagnetic generating system configured to generate electromagnetic waves in the cylinder body to heat an object to be processed. The refrigerating and freezing device further includes a cabinet door detection device, and the cabinet door detection device is configured to detect open and closed states of the cabinet door corresponding to the storage compartment provided with the cylinder body; and the electromagnetic generating system stops generating electromagnetic waves when a corresponding cabinet door is in an open state, which can prevent electromagnetic waves in the heating unit from leaking and affecting the health of a user, thereby improving the safety of the refrigerating and freezing device.