Our examination of possible mechanisms of the formation of albedo spots on asteroid surfaces leads to the conclusion that the most probable mechanism of the spot formation is the impact crater generation and some processes associated with it. The conclusion is confirmed by reflectance spectra of the asteroids Hygiea (10), Hertha (135) and Philomela (196), by the results of the spectral-frequency analysis of detail sizes on the surfaces of Vesta (4) and Lutetia (21) as well as by estimates for parameters of impact formations.