Computations of the directional transfer of water vapor over Osan are made for seasonal and vertical distributions of the water vapor transfer, based on aerological data during the period from 1972 to 1981. The results show that annual total value of water vapor amounts to 1812 g/cm·sec. The largest transfer occurs in summer and in eastward with 53 percent of the annual total. It is also of interest that the maximum values of water vapor transfer appear to be in the layer between the 800mb and 600mb level in winter and between the 900mb and 800mb levels in summer. The horizontal divergences of water vapor transfer for two months of January and July 1979, using aerological data observed at Osan, Kwangju and Pohang are also calculated and the results are briefly discussed.