The invention discloses a dry-hanging wall slab structure which comprises composite panels and keel frames, wherein the composite panels comprise support slabs and fasteners; the fasteners are connected with the back surfaces of the support slabs; the keel frames comprise keels and adjustors used for adjusting the keels to move relatively closer to or far away from a wall surface; the adjustors are connected with the wall surface and the keels; and the fasteners are in hanging connection with the keels. According to the dry-hanging wall slab structure, positions of the keels are adjusted by the adjustors, and then the composite panels are arranged on the keel frames in a hanging manner to allow the fasteners to be in hanging connection with the keels, so that a construction process of a wall slab can be accomplished quickly, and the field operation time can be reduced; compared with the traditional operation mode, procedures are few, and the efficiency is increased to 2-3 times; in addition, a common worker can accomplish construction operation, and no skillful muddy water slurry and painting technicians are required; and the composite panels are uniform, even and precise in thickness, stable in quality, smooth in surface, and high in leveling precision.