Odor is closely bound up with people’s lives. Hazardous gases can do us more harm. It is now imperative to take a deep dive into life odors in order to lessen the harm the hazardous gases cause to human body. In modern times, the integration of mobile internet and odor source localization is a new trend of current study in the field. A plume model is used herein to conduct a simulation experiment on odor source localization based on the IoMT (Internet of Mobile Things). Study results show that: indoor simulation experiment has a very high success rate, but there is a fuzzy effect of the step size and the sensor distribution radius on the success rate of the odor source localization; if the step size and the sensor distribution radius are lesser, the success rate of the odor source localization is subjected to the two to a certain extent and shows a downward trend. The success rate of simulation experiment in the outdoor environment is significantly lower than that in the indoor environment. Therefore, it is very important to choose a reasonable range of values in the simulation experiment.