Method and system applicable to polluted water area and capable of improving peculiar smell substance recognition accuracy

The invention discloses a method and a system for improving the accuracy of identifying peculiar smell substances suitable for polluted water areas, a gas chromatograph sequentially separates a plurality of generated gas samples, and each gas sample is divided into two parts, namely a first part and a second part; conveying the first part to a detector for qualitative and quantitative analysis; and the second part is used for heating or cooling to simulate the environment temperature of the polluted water area site, mixing a proper amount of moist air to simulate the gas composition and environment humidity of the polluted water area site, and finally conveying to a sniffing port for sniffing and distinguishing by a sniffing worker. A gas sample separated by a gas chromatograph is heated or cooled to simulate the environment temperature of a polluted water area site, a proper amount of moist air is mixed to simulate the gas composition and environment humidity of the polluted water area site, the environment