The black carbon (BC) and particulate matter 2.5 (PM2.5) were measured using Multi-Angle Absorption Photometer (MAAP) and optical particle counter (OPC) at a campus site located in Yongin for the period January 2013 through May 2019. BC decreased from -0.03 μg/m3·yr and PM2.5 decreased to -4.21 μg/m3·yr. The monthly average concentration was the lowest at (0.49±0.23 μg/m3) in July when precipitation was high for BC and the highest at (1.47±0.72 μg/m3) in January when heating fuel in winter was high. PM2.5 was also high in winter, but the lowest concentration was 16.43±1.53 μg/m3 in September. During the weekend, BC had a clear difference in concentration during the week than PM2.5, BC had the highest concentration on Mondays and PM2.5s on Thursdays, all of which were the lowest on Sundays. As a result of the seasonal daily variation, the increase of BC and PM2.5 concentration was obvious in the morning due to the increase of traffic at rush hour, but in the afternoon, there was no correlation with the traffic volume. The BC/PM2.5 ratio was lower from good to bad grade, which is consistent with Seoul and was lower than Seoul. The particle number concentration in range of 10.3-290.8 nm was measured using Scanning mobility particle sizer (SMPS) from February 2015 to April 2017. The size distribution of nano particles was classified by K-means clustering method. The clusters were divided into five-groups: “Background”, “Local emissions”, “Traffic”, “Nucleation”, “Growth”. The background cluster were formed under relatively clean atmospheric conditions with large particle sizes, lowest number concentrations, and low pollutants concentrations. Local emissions clusters were inversely proportional to the Planetary bounded layer (PBL), which suggests that the frequency of the four seasons was evenly higher and the frequency was mainly increased at night. High concentrations of pollutants were the result of atmospheric congestion due to slow wind speeds. The traffic clusters were observed morning and afternoon rush hour and morning peak size was bigger than afternoon. This is because Korea was fixed in the office going hour, while the quitting time was dispersed. The large mode diameter was influenced by surrounding industrial vehicles. The nucleation cluster had the highest concentration of SO2, a precursor of H2SO4, a key role in particle formation and photochemical reactions were involved because solar irradiance was high. Peaks at 70-80 nm were result of mixed traffic effects. As the growth cluster had a high solar irradiance, it was considered that nucleated particles were grown by condensation and coagulation of photochemical reaction products.