Occupants and their activities are important factors affecting indoor air quality, especially for high occupant density building space.Emitting mechanism of indoor occupant-related sources was analyzed for normal condition, the level of main occupant-related pollutants characteristic agreeing with indicator choosing principles was judged and reasonable indicator of indoor air pollution caused by occupant was chosen.Then the recommended concentration limit of indicator was given for unadapted and adapted persons according to logarithmic index evaluation method, combined with percentage of dissatisfaction and joint effect analysis.