The impact of the room temperature on the occupants' recollection of watched video program was studied in two sessions, i.e., the experiment under warm condition (29℃) and that under cool condition (22℃). After watching 30 minutes video program, the subjects answered the questionnaire, which asked the contents of the program. It was found that there was significant difference in the percentage of correct answer in the rather difficult questions of the above questionnaire between two sessions. The percentage of correct answer under the cool condition was more than that under the warm condition. The evaluation for the indoor environment and the subjects' internal condition by the subjects under the warm condition was worse than that by the subjects under the cool condition. Besides the experiments, the subjects' memorization faculty was tested. There was no significant difference in the memorization faculty between two sessions of the subjects.
