The invention discloses a mounting system for a point supporting porcelain plate. The mounting system comprises a keel frame, dry-hanging assemblies, bolt assemblies and positioning rubber strips; thekeel frame is mounted on the wall surface; the dry-hanging assemblies are fixed to the keel frame through the bolt assemblies; each dry-hanging assembly comprises a main hanging piece, an upper fastener and a lower fastener; the positioning rubber strips are clamped between the upper fasteners and the lower fasteners; and the upper end faces of the positioning rubber strips are closely attached to the lower end face of a first horizontal extension part, and the lower end faces of the positioning rubber strips are closely attached to the upper end face of a second horizontal extension part. The porcelain plate is sequentially controlled and fixed through the lower fasteners, bearing parts and upper fasteners of the different dry-hanging assemblies from top to bottom, so that the mounting structure of the porcelain plate is stable; and the dry-hanging assemblies are simple in structure, construction is convenient in mounting, and the mounting efficiency is advantageously improved.