In order to track the odor source and odor fingerprint characteristics of the sewage treatment plant, this study makes quantitative analysis and evaluation. Based on the advantages of odor sensory evaluation and odor source identification of electronic nose technology, this study focuses on the odor pollution of urban sewage treatment plants. This study firstly introduces the principle and application of electronic nose technology, then takes an urban sewage treatment plant in Wuhan as the sampling point and the (Malodorous Volatile Organic Compounds (MVOCs) in the odor pollution as the research object; evaluates the fingerprint characteristics of single component in MVOCs with electronic nose sensor, and tests the quantitative evaluation relationship of odor. Finally, the contributions of each pollution source to the odor concentration in each sewage treatment plant are analyzed through forecasting the odor in the surrounding environment. The theoretical research and practical application of electronic nose technology in odor evaluation has a forward-looking guiding significance for odor detection and management of sewage treatment plants in the future.