Plants respond to various environmental factors. Bioelectric potential is used to examine such responses. The bioelectric potential of pothos pots in response to light intensity, atmospheric temperature and air volume have been examined. From our results, it is clear that the potential changes with environmental factors. In this study, two pothos pots were set up in a living space, and the bioelectric potentials of the pots were examined to investigate whether there are any marked individual differences between the two. If there is a noticeable difference, the effective application of the bioelectric potential becomes relatively limited. We found a correlation coefficient of 0.7 between the potentials of the two plants under darkness and the operation of an air conditioner. A proposed summarized value was adopted to analyze the bioelectric potential. Individual differences were identified to some degree, but the characteristics closely resembled each other. The coefficient between the summarized potentials exceeded 0.85 as time progressed. It is considered that plants can function as sensors of environmental factors.