This study analyzes and collects data for two years from 2020 to 2021 and analyzes 578 odor test data from Yeosu, Ulsan, and Seosan. Based on the analysis data by time zone, region, location, etc, this study proposes practical measures suitable for petrochemical complexes by focusing on the odor generation environment and the characteristics of inducing substances. In the case of complex odors, the Yeosu National Industrial Complex exceeded the strict emission allowance standard by six times at two points in the management area, the Daesan Industrial Complex exceeded the standard twice in the management area and affected area, and the Ulsan Industrial Complex was within the standard. In the case of ammonia, the Yeosu Industrial Complex had a detection rate of about 70.4 % compared to the Ulsan Industrial Complex, more than twice the detection rate of the Ulsan Industrial Complex at about 31.4 %. Three items out of 22 designated odors were detected in the Yeosu Industrial Complex, five items were detected in the Ulsan Industrial Complex, and four types of aldehydes were detected in Daesan Industrial Complex. Except for one detection of i-butyl alcohol at the Ulsan Industrial Complex, it was judged that few items belonging to volatile organic compounds were detected. However, due to the nature of the petrochemical complex, volatile organic compounds have been reported several times, which requires real-time air pollutant measurement vehicles or operation of odor integrated control centers linked to workplaces to quickly analyze and identify responsibility. Designated odors, which are odor-causing substances and air pollutants that account for most of the emissions from the petrochemical industrial complex, are mainly composed of carbon. This study, which investigates and analyzes the concentration data of odor substances in Korea's three influential industries, aims to contribute to achieving the carbon neutral goal for zero carbon.