To provide a simple and inexpensive coloring construction method such as a roadbed surface, without impairing an aesthetic appearance of a factory and a warehouse or a connecting passage of these, while satisfying impact resistance, abrasion resistance, water resistance, weatherability, pollution resistance and chemical resistance.

A coating layer 8 is formed while respectively interposing drying time of about 20 to 30 minutes, by repeating at least a plurality of times of coatings 3, 4, 5, 6 and 7 on a floor surface 2 such as a mortar or concrete building frame 1 by wax mainly composed of an acrylic resin and including inorganic powder, a coloring pigment and additive.