To provide a coating method for exposed concrete surfaces suitable, particularly for a secularly degraded surface.

For the exposed concrete surface, a primary coating material comprising a synthetic resin emulsion and a white pigment having whiteness of 95 or more and an average particle size of 0.1 to 1 μm is applied, subsequently, a middle coating material which comprises a synthetic resin emulsion and an extender pigment having whiteness of ≥50 and <95 and an average particle size of 0.1 to 50 μm and has a hiding rate of a formed coated film of 10 to 50% is applied and, thereafter, an over coating material which comprises a synthetic resin emulsion and has a hiding rate of a formed coated film of ≤10% is applied.