In the given paper the comparative analysis of various methods and their opportunities for diagnostics of radioactive pollution of the near-ground layers of the atmosphere, including secondary displays of a radio-activity, is presented. Under radioactive action physical and chemical properties of the atmospheric components change, and, as a result, there occurred abnormal gaseous-aerosol and ionized area, which essentially depend on optical and meteorological situations. Diffusion of the radioactive areas caused by emissions of the nuclear-processing enterprises is estimated for various meteorological situations. Active and passive remote methods detecting anomalies caused by radioactivity in the atmosphere are considered. The brief analysis of the results received with participation of the author in the field of development of passive remote technologies studying radioactive pollution, caused by industrial emissions in the atmosphere, and also a method of laser-induced breakdown of aerosols is considered. It is shown, that remote technologies are perspective for the ecological monitoring of radioactive pollutino of the atmosphere. Their high sensitivity enables to regiser pollution on the long distances from an objet, and use of passive and active methods will simultaneously allow receiving more full information on a radioactive anomolies.