A refrigerator having a separate ice-making system, comprising: a refrigerating compartment; an ice-making chamber disposed inside the refrigerating compartment, wherein an ice maker is arranged inside the ice-making chamber, and an ice-making refrigeration system configured to refrigerate the ice-making chamber; wherein the ice-making refrigeration system includes an ice-making evaporator disposed inside the refrigerating compartment and outside the ice-making chamber; an ice-making air supply duct; an ice-making fan; and an ice-making air return duct, wherein the ice-making air supply duct and the ice-making air return duct are arranged parallel to each other, and the ice-making evaporator is communicated with the ice maker through the ice-making air supply duct and the ice-making air return duct to form a refrigerating circulation loop; and a refrigeration system disposed in the refrigerating compartment, wherein the refrigeration system includes a refrigerating evaporator, a refrigerating air supply duct, a refrigerating fan, and a refrigerating air return duct, the refrigerator having a separate ice-making system further comprising a refrigerating ice-making air duct disposed in the refrigerating compartment, the refrigerating ice-making air duct includes an air duct front cover plate, an air duct foam, and an air duct rear cover plate disposed sequentially in a direction from front to rear, wherein the ice-making air return duct is provided in between the air duct foam and the air duct rear cover plate, the air duct front cover plate is disposed on an inner surface of a rear wall of a refrigerating compartment liner; wherein the air duct front cover plate and the air duct rear cover plate are detachably connected and fastened to the inner surface of the rear wall of the refrigerating compartment liner by screws or rivets; wherein the ice-making air supply duct is provided in between the air duct rear cover plate and the rear wall of the refrigerating compartment liner, and the ice-making evaporator is installed in the ice-making air supply duct; wherein the refrigerating air supply duct is provided in between the air duct foam and the air duct rear cover plate, and the refrigerating fan sends cold air into the refrigerating air supply duct; and the refrigerating air return duct is provided between the air duct rear cover plate and the rear wall of the refrigerating compartment liner; and wherein the refrigeration system and the ice-making refrigeration system are independent and separate from each other and are not communicated. a refrigerating compartment; an ice-making chamber disposed inside the refrigerating compartment, wherein an ice maker is arranged inside the ice-making chamber, and an ice-making refrigeration system configured to refrigerate the ice-making chamber; wherein the ice-making refrigeration system includes an ice-making evaporator disposed inside the refrigerating compartment and outside the ice-making chamber; an ice-making air supply duct; an ice-making fan; and an ice-making air return duct, wherein the ice-making air supply duct and the ice-making air return duct are arranged parallel to each other, and the ice-making evaporator is communicated with the ice maker through the ice-making air supply duct and the ice-making air return duct to form a refrigerating circulation loop; and the ice-making refrigeration system includes an ice-making evaporator disposed inside the refrigerating compartment and outside the ice-making chamber; an ice-making air supply duct; an ice-making fan; and an ice-making air return duct, wherein the ice-making air supply duct and the ice-making air return duct are arranged parallel to each other, and the ice-making evaporator is communicated with the ice maker through the ice-making air supply duct and the ice-making air return duct to form a refrigerating circulation loop; and a refrigeration system disposed in the refrigerating compartment, wherein the refrigeration system includes a refrigerating evaporator, a refrigerating air supply duct, a refrigerating fan, and a refrigerating air return duct, the refrigerator having a separate ice-making system further comprising a refrigerating ice-making air duct disposed in the refrigerating compartment, the refrigerating ice-making air duct includes an air duct front cover plate, an air duct foam, and an air duct rear cover plate disposed sequentially in a direction from front to rear, wherein the ice-making air return duct is provided in between the air duct foam and the air duct rear cover plate, the air duct front cover plate is disposed on an inner surface of a rear wall of a refrigerating compartment liner; wherein the air duct front cover plate and the air duct rear cover plate are detachably connected and fastened to the inner surface of the rear wall of the refrigerating compartment liner by screws or rivets; wherein the ice-making air supply duct is provided in between the air duct rear cover plate and the rear wall of the refrigerating compartment liner, and the ice-making evaporator is installed in the ice-making air supply duct; wherein the refrigerating air supply duct is provided in between the air duct foam and the air duct rear cover plate, and the refrigerating fan sends cold air into the refrigerating air supply duct; and the refrigerating air return duct is provided between the air duct rear cover plate and the rear wall of the refrigerating compartment liner; and