Abstract: Environmental technology verification (ETV) is one of the effective evaluation methods for new environmental technology. It is a development trend of air pollution control in key industries by adopting ultra-low emission technologies. The research on ultra-low emission technologies verification of coal-fired power plants is an innovation in the refined application of environmental technology verification in the industry. In this study, based on analyzing the characteristics of air pollutants ultra-low emission technologies for coal-fired power plants, the verification index system of ultra-low emission technology for the coal-fired power plants was constructed by using an analytic hierarchy process, investigation and research methods, etc., and the acquisition method of verification index, test cycle and sample size, sampling frequency as well as index evaluation method were proposed. The application verification was carried out by taking an ultra-low emission combined technology, SCR denitration+dry electrostatic precipitation+limestone-gypsum wet desulfurization+wet electrostatic precipitation, as the example. The results showed that the technology verification method could objectively, scientifically, and effectively reflect the real performance of the technology on aspects of economy, environmental impact, maintenance and management, etc.