A tray for bearing different storage units includes a main body and a connecting rod. The main body includes a bottom plate, and the bottom plate has a bearing surface for bearing the storage units; the bottom plate is provided with an arc-shaped through hole. The arc-shaped through hole has a first end and a second end opposite to each other. The connecting rod is pivotally connected with the bottom plate, and one end of the connecting rod moves between the first end and the second end along the arc-shaped through hole. The tray further includes a supporting portion disposed on a side of the bottom plate opposite to the bearing surface and used for supporting the connecting rod.