In this paper,fluxes of momentum and sensible heat are discussed with the data callected by tetheredballoon sounding system over the Philippine Sea during the cruise of the R/V SCIENCE 1 from Septem-ber through October in 1987.These fluxes were calculated using the semiempirical flux-profile relationshipsof Monin-Obkhov similarity theory with observed data.The friction velocity U.was determined by theobserved data’s least-square fit with the similarity formulae under stable,neutral and unstable conditions.The roughness Z_0 was determined by Z_0=a_1(U./g),then substituted into the similarity formulae to com-pute U.again.The final values of U.and Z_0 could be determined through this iteration.The fluxtemperature θ.was calculated from the temperature profile with Z_0 determined above.Finally the fluxes’of momentum and sensible heat,and the drag coefficient C_D were obtained by computation with U.,θ.and the wind speed(U_(10))at 10 meters above the sea surface. In this paper, fluxes of momentum and sensible heat are discussed with the data callected by tethered balloon sounding system over the Philippine Sea during the cruise of the R / V SCIENCE 1 from Septem-ber through October in 1987. These fluxes were calculated using the semiempirical flux-profile relationships of Monin-Obkhov similarity theory with observed data. The friction velocity U. was determined by theobserved data’s least-square fit with the similarity formulae under stable, neutral and unstable conditions. The roughness Z_0 was determined by Z_0 = a_1 (U ./g), then substituted into the similarity formula to com-pute U.again. The final values ​​of U.and Z_0 could be determined through this iteration.The fluxtemperature θ.was calculated from the temperature profile with Z_0 determined above.Finally the fluxes of momentum and sensible heat, and the drag coefficient C_D were obtained by computation with U., θ.and the wind speed (U_ (10)) at 10 meters above the sea surface.