A refrigerating and freezing device, comprising: a casing , wherein a storage space is defined in the casing, a storage container is disposed in the storage space, and the storage container comprises a controlled atmosphere fresh-keeping space therein, the storage container comprising: a top cover , wherein a lower surface of the top cover is provided with a concave cavity; and a bottom box , disposed below the top cover, and forming the controlled atmosphere fresh-keeping space together with the top cover; and a controlled atmosphere membrane component , disposed inside the concave cavity, wherein the controlled atmosphere membrane component comprises at least one controlled atmosphere membrane and an oxygen gas-enriched collecting cavity, a space around the controlled atmosphere membrane component communicates with the controlled atmosphere fresh-keeping space, and the controlled atmosphere membrane component is configured to allow more oxygen gas in an airflow in the space around the controlled atmosphere membrane component than nitrogen gas in the airflow in the space around the controlled atmosphere membrane component to pass through the controlled atmosphere membrane to enter the oxygen gas-enriched collecting cavity, characterized in that an air extracting device , wherein the air extracting device comprises an air extracting pump , and is configured to extract gas penetrating into the oxygen gas-enriched collecting cavity to an outside of the storage container, and enable gas flowing out of the oxygen gas-enriched collecting cavity to firstly perform heat exchange with a pump casing of the air extracting pump and then enter the air extracting pump, or enable the gas flowing out of the oxygen gas-enriched collecting cavity to firstly enter the air extracting pump and flow out of the air extracting pump and then perform heat exchange with the pump casing of the air extracting pump. a top cover , wherein a lower surface of the top cover is provided with a concave cavity; and a bottom box , disposed below the top cover, and forming the controlled atmosphere fresh-keeping space together with the top cover; and a controlled atmosphere membrane component , disposed inside the concave cavity, wherein the controlled atmosphere membrane component comprises at least one controlled atmosphere membrane and an oxygen gas-enriched collecting cavity, a space around the controlled atmosphere membrane component communicates with the controlled atmosphere fresh-keeping space, and the controlled atmosphere membrane component is configured to allow more oxygen gas in an airflow in the space around the controlled atmosphere membrane component than nitrogen gas in the airflow in the space around the controlled atmosphere membrane component to pass through the controlled atmosphere membrane to enter the oxygen gas-enriched collecting cavity, characterized in that an air extracting device , wherein the air extracting device comprises an air extracting pump , and is configured to extract gas penetrating into the oxygen gas-enriched collecting cavity to an outside of the storage container, and enable gas flowing out of the oxygen gas-enriched collecting cavity to firstly perform heat exchange with a pump casing of the air extracting pump and then enter the air extracting pump, or enable the gas flowing out of the oxygen gas-enriched collecting cavity to firstly enter the air extracting pump and flow out of the air extracting pump and then perform heat exchange with the pump casing of the air extracting pump. <EOS>