The present disclosure provides an air conditioner installation plate and an air conditioner. The air conditioner installation plate includes: a main plate, a clamping member on a surface of the main plate, the clamping member and the main plate collectively a clamping space; and a horizontal bubble, provided in the clamping space and filled with liquid, an air bubble being reserved in the liquid of the horizontal bubble; a transverse direction of the horizontal bubble is parallel to a transverse direction of the main plate, two position indicating lines being marked on a middle of the horizontal bubble at intervals along the transverse direction.