Abstract: A tile and mounting mat assembly comprises at least one tile and a mounting mat which is able to receive four tiles. The tile has at least one hole on the back thereof. The mounting mat includes four side walls and a plurality of primary ribs. Two neighboring walls of the four side walls have a plurality of pairs of snap feet and the other two neighboring walls of the four side walls have a plurality of connecting hooks. The primary ribs are crossed within the side walls so as to define at least a first intersection point and partition the mounting mat into at least four frames. Each of the frames has a plurality of secondary ribs. The plurality of secondary ribs are crossed so as to define a plurality of second intersection points, wherein a plurality of positioning posts are respectively formed at each of the second intersection points so as to fit into the holes of a tile when the tile and the mounting mat are assembled, whereby at least four tiles are mounted on the mounting mat.