A mounting apparatus includes a bottom panel, a first mounting member, and a second mounting member. The bottom panel includes a top surface and a bottom surface. The first mounting member includes a positioning portion and an installation portion. A concave portion is defined in the bottom surface, for receiving and preventing the positioning portion from rotating relative to the bottom panel. The bottom panel defines a through hole, for an installation portion. The second mounting member includes a locking portion. The locking portion defines an installation hole, for locking the installation portion. The bottom panel top surface t is between locking portion and positioning portion. The positioning portion bottom surface place in the same plane with the bottom panel bottom surface or is between the bottom panel top surface and the bottom panel bottom surface.