A foldable device and a foldable fan and a foldable table lamp applicable thereto are provided. The foldable device comprises: a chassis for supporting an electronic device or a small electric device, and a telescopic mechanism of which one end is assembled with the chassis and the other end is assembled with an electronic device or a small electric device. The telescopic mechanism is telescoped to adjust the support height during use, and the telescopic mechanism is retractably received in the chassis during receiving. The foldable device adopting the above technical solution has a simple and compact structure, and the foldable device is mainly applied to an electronic product or a small electric device that needs to be folded and received, and the folded electronic product has a small body shape, which does not occupy space and is easy to be received.