Active Galaxies may be revealed in all spectral ranges and show interesting features from gamma-rays to radio. We will review our recent results on search and studies of active galaxies, both AGN and Starbursts, using all-sky or large-area surveys in X-ray (ROSAT and others), UV (GALEX), optical (SDSS, Gaia and others), IR (2MASS, WISE, IRAS and others) and radio (NVSS, FIRST and others) and based on cross-correlations of different catalogs and samples. Using SDSS spectroscopy, we have carried out fine optical classification for activity types for Active Galaxies. These objects come from a number of samples of some 10,000 candidate Active Galaxies using pre-selection from various samples; bright objects of The Catalog of Quasars and Active Galactic Nuclei, Markarian Galaxies, Blazars, AGN candidates among X-ray sources, IRAS extragalactic objects, including ULIRG and HLIRG candidates, variable radio sources and optically variable radio sources, etc. A number of papers have been published with the results of this spectral classification. The fine classification shows that many QSOs show the same features as Seyferts. We have introduced subtypes for the QSOs: QSO1.0, SO1.2, QSO1.5, QSO1.8. Thus, independent of the luminosity, AGN show the same features. Narrow-Line Seyfert 1 galaxies have been classified into subtypes NLS1.0, NLS1.2, NLS1.5, NLS1.8 and NLS1.9. And similarly, Narrow-Line QSOs exist and we have introduced subtypes NLQ1.0, NLQ1.2, NLQ1.5, NLQ1.8 and NLQ1.9. We also have classified many narrow-line objects as Composites. Moreover, it appears that Composites may contain some broad-line objects as well, such as Sy1.8/LINER, Sy1.9/HII, Sy1.8/LINER/HII, etc. The QSOs subtypes together with Seyfert ones allow to follow AGN properties along larger redshift range expanding our knowledge on the evolution of AGN to more distant Universe represented by QSOs.