The invention discloses a universal tray assembly and a refrigerator. The universal tray assembly is used for being arranged on a shelf of the refrigerator. The universal tray assembly comprises trays and supports. Each tray comprises a bottom plate, side plates arranged on the two opposite sides of the bottom plate and hanging lugs arranged on the sides, deviating from the bottom plate, of the side plates. The hanging lugs of the trays are connected with the supports. The supports can be detachably buckled on the shelf. According to the universal tray assembly and the refrigerator, the hanging lugs of the trays are buckled on the shelf through the supports, the trays can be arranged at the upper portion and the lower portion, a user can select to reversely buckle the trays on the upper portion of the shelf or hang the trays on the lower portion of the shelf according to the space situation in the refrigerator, the internal containing space of the refrigerator is conveniently changed, and the space utilization rate is increased.