A refrigerating and freezing device, comprising: a storage compartment partitioned into a plurality of first spaces; a cooling chamber configured to accommodate an evaporator of the refrigerating and freezing device; an air channel system having a plurality of first air supply outlets, a main return air outlet and an on-off control device; and a plurality of drawers, wherein each drawer is mounted in one of the first spaces, each drawer has an air inlet and a return air outlet, each air inlet is communicated with one of the first air supply outlets, and each return air outlet is communicated with the main return air outlet; and the on-off control device is configured to control air flow from the cooling chamber to flow to one or more of the plurality of first air supply outlets, and then control all or part of the air flow to flow to the corresponding drawers, thus controlling the temperature in the corresponding drawers, characterized in further comprising that a level generating device configured to generate a plurality of level instruction sets, wherein each level instruction set comprises a plurality of level instructions, and correspondingly controls one of the drawers; each level instruction comprises control information that controls the corresponding drawer to be at a target temperature or within a target temperature range, so that the refrigerating and freezing device controls the on-off control device according to each level instruction and then controls the temperature in the corresponding drawer, wherein the level generating device comprises a plurality of display control panels disposed at front parts of the respective drawers, and each display control panel is configured to receive a signal and generate the level instructions of one of the level instruction sets, further comprising a plurality of electrical connection sockets, wherein each electrical connection socket is disposed at a rear part of one of the first spaces; and the rear part of each drawer has an electrical connection plug inserted into the corresponding electrical connection socket to transmit signals and/or supply power; each display control panel is connected to the corresponding electrical connection plug. a storage compartment partitioned into a plurality of first spaces; a cooling chamber configured to accommodate an evaporator of the refrigerating and freezing device; an air channel system having a plurality of first air supply outlets, a main return air outlet and an on-off control device; and a plurality of drawers, wherein each drawer is mounted in one of the first spaces, each drawer has an air inlet and a return air outlet, each air inlet is communicated with one of the first air supply outlets, and each return air outlet is communicated with the main return air outlet; and the on-off control device is configured to control air flow from the cooling chamber to flow to one or more of the plurality of first air supply outlets, and then control all or part of the air flow to flow to the corresponding drawers, thus controlling the temperature in the corresponding drawers, characterized in further comprising that a level generating device configured to generate a plurality of level instruction sets, wherein each level instruction set comprises a plurality of level instructions, and correspondingly controls one of the drawers; each level instruction comprises control information that controls the corresponding drawer to be at a target temperature or within a target temperature range, so that the refrigerating and freezing device controls the on-off control device according to each level instruction and then controls the temperature in the corresponding drawer, wherein the level generating device comprises a plurality of display control panels disposed at front parts of the respective drawers, and each display control panel is configured to receive a signal and generate the level instructions of one of the level instruction sets, further comprising a plurality of electrical connection sockets, wherein each electrical connection socket is disposed at a rear part of one of the first spaces; and the rear part of each drawer has an electrical connection plug inserted into the corresponding electrical connection socket to transmit signals and/or supply power; each display control panel is connected to the corresponding electrical connection plug.