The transition from the He atom to the complex atoms description in the method of interacting configurations in the complex number representation has been presented. As a first step the problem of ionization of H − and Li + ions is considered. The spectroscopic characteristics of the Be, Mg and Ca atoms in the problem of the electron-impact ionization of these atoms are investigated. Few results in the photoionization problem on the 1 P autoionizing states above the n=2 threshold of helium-like Be ++ ion are presented. The energies and the widths of the lowest 1 S, 1 P, 1 D, and 1 F autoionizing states of the Be, Mg atoms, and the lowest ( 1 P ) autoionizing states of Ca atom, are calculated. We consider briefly both a review of our previous results (together with results of other authors) and new calculations of our group. A brief review of the methods of the quasi-stationary states calculation is given.