Abstarct: Most people around the world spend more than 90% of the day time in indoors such as houses, offices, factories, schools and universities. Therefore, assessment of indoor environmental quality (IEQ) in high population density indoors is required and there is lack of such these studies in Iran. The present study was carried out to evaluate the IEQ at Shahrood University of Technology via objective measurement and subjective assessment. This study was conducted in winter and spring due to the indoors service conditions and its critical time period and it was scheduled data collecting from indoors. To assessment of IEQ, parameters including concentration of carbon dioxide (CO2), volatile organic compounds (VOCs) and particulate matter PM2.5, air temperature, relative humidity, air velocity, luminance and sound level were measured. Also it was surveyed occupants’ sensation votes by subjective assessment through questionnaires. The results showed that the average values of the parameters in indoors in total of seasons were 513.1±143.1 ppm, 0.13±0.57 ppm, 12±8.9 μg/m3, 23.1±2.4 oC, 20.6±9.2 %, 0.06±0.08 m/s, 503.1±322 lux and 55.1±12.3 dBa respectively. Also according to the results, the average values for all parameters are within the related standard limits. The results stated that for the "indoor environmental quality feeling" question in the questionnaire, the number of good quality votes were much more than the number of bad quality votes. Also, men felt better IEQ than women. Generally according to the occupants’ sensation in the indoors of Shahrood university of technology, IEQ were acceptable and men satisfaction were more than women (approximately twice as much).