The atmospheric fine particles meter(FPM) was used for continuously in-line monitoring of atmospheric fine particles spectrum during the 2010 Guangzhou Asian Games and Paralympic Games in Guangzhou city and Guangzhou surrounding areas. Characteristics of the partical number concentration curve were analysed.The diurnal variation of particle number concentration was discussed. And the number of particles’ diurnal variation in each mode concentration was discussed respectively. The results show that atmospheric aerosol particles are mainly concentrated in the smaller particle size. The results show that the nucleation mode particles are affected by the process of nucleation and traffic emissions. The curve show a single peak in Guangzhou city station and three-peak in Heshan station. Atiken mode particles are impacted by human activities and nucleation mode particles with curve of three-peak distribution in Guangzhou city station and two-peak distribution in Heshan station. Accumulation mode particles and coarse particle mode particles has a significantly feature that the concentration was lower during the day and higher in the night. With the effect of splashes of salt coarse particle mode particles’ curve has a peak at night in Heshan station. The effect of the rainfall’s scavenging to particles in atmosphere was discussed.