The invention discloses a high-efficiency energy-saving multifunctional refrigerating device taking liquid as a cold absorbing medium, comprising a refrigerating device shell, a refrigerating device inner container, a waste heat utilization type sterilizing cabinet assembly, a throttling assembly, a liquid heat absorbing assembly, a procedure controller, a compressor, a high-temperature pipe, a low-temperature pipe, a condenser, an evaporator, a four-way reversing valve, liquid, a liquid cold absorbing box, a liquid heat absorbing case and a temperature sensor, wherein the refrigerating device inner container is at least matched with one liquid cold absorbing box; and the evaporator is arranged in the liquid cold absorbing box which is filled with the liquid. The high-efficiency energy-saving multifunctional refrigerating device utilizes discharged waste heat to heat a sterilizing cabinet, thereby realizing the high-temperature dry sterilization of the sterilizing cabinet; the evaporator and the condenser are immerged in the liquid, therefore, the high-efficiency energy-saving multifunctional refrigerating device can greatly enhance the heat exchanging effect of the evaporator and the condenser to realize the high efficiency and energy saving; and the high-efficiency energy-saving multifunctional refrigerating device is any one of a refrigerator, an ice chest, a display cabinet, a wine cabinet, a refrigerator car, a freezer car, a refrigerating storage and a freezing storage.