Provided is a storage device (100) of a refrigerator, wherein the device is placed in a refrigerating compartment. The device comprises: a base assembly, of which an upper surface is used for bearing articles to be stored, and on which a light sensor (132) used for detecting an article placement condition is provided; a spacing plate (140), which is provided on the base assembly and on which at least one hollowed area (142) for the articles to be stored to pass is formed; a state collection component (144), which is electrically connected to the light sensor (132), and is used for determining an article placement state according to a detection result of the light sensor (132); and a wireless transmission component (145), which is electrically connected to the state collection component (144), and is used for sending the article placement state determined by the state collection component (144).