Abstract: The invention is to provide an adjustable supporting apparatus. The adjustable supporting apparatus includes a first mounting plate, a second mounting plate, a first link, and a second link. The first mounting plate provides N guiding grooves. The second mounting plate provides M guided bosses, each of which corresponds to one of the guiding grooves and is limitedly and movably disposed in the corresponding guiding groove. A first end of the first link is pivotally engaged to the second mounting plate, and a second end of the first link rotatably links to a third end of the second link. A fourth end of the second link is pivotally engaged to the first mounting plate. Thereby the second mounting plate together with an object mounted thereon is operable to move with respect to the first mounting plate mounted on a base.