During the period from Jan. to Dec. 1998 and Yellow Sand phenomena, dustfall samples were collected by simple deposit jar and petridish, and calculation of passage amounts of Yellow Sand by the utilization of environmental air monitoring 4 stations from 1995 to 1998 in Seoul. Passage amounts of Yellow Sand were estimated 3,024 ton in 1995, 367 ton in 1996, 105 ton in 1997 and 3,444 ton in 1998 respectively. The highest passage amount of Yellow Sand was marked 3,444 ton in 1998 that is related to frequence of appearance. Average deposition of dusfall was $6.570{;}ton/ extrm{km}^2$/month during the sampling periods, while average deposition of dusfall in Yellow Sand phenomena was $53.68{;}ton/ extrm{km}^2$/month which was 8 times higher than average deposition.