High-efficiency freezing and refrigerating system

The invention relates to a high-efficiency freezing and refrigerating system which comprises a freezing control device, a refrigeration space and at least one freezing and refrigerating space, wherein the freezing control device comprises a compressor and a low-temperature air circulating pipeline; at least one isolation space is arranged in the refrigeration space; a cold accumulation material capable of absorbing external heat energy is placed in each isolation space; a temperature control device is arranged in each isolation space; each isolation space is connected with the low-temperature air circulating pipeline of the freezing control device through a cooling switching device; in addition, each isolation space is provided with a low-temperature air circulating device, and the low-temperature air circulating devices are connected through the low-temperature air circulating pipeline; the at least one freezing and refrigerating space is superimposed below the refrigeration space; a temperature control devi