A light-emitting diode (LED) device for use in the sterilization of a refrigerator, comprising: an LED lamp (10), comprising a plurality of LED lamps (11) and sensors (12), which are arranged side-by-side and which are slidably connected in the vertical direction to a top portion of an inner side of a refrigerator (30); a controller (20), which is located at the inner side of the refrigerator (30), the controller (20) being communicably connected to the LED lamps (11) and the sensors (12), respectively; the LED lamps (11) are blue LEDs which vertically illuminate a surface of a stored object (31), while the sensors (12) are used to acquire information on the real-time vertical distance between an LED lamp (11) that is arranged therebeside and a top end of the stored object (31), sending said information to the controller (20); according to the received real-time vertical distance information, the controller (20) sends first driving information to drive an LED lamp (11) to move in the vertical direction toward
