A method of achieving dropwise condensation using Langmuir-Blodgett (L-B) built-up film technology is presented. One and three layers of barium stearate monomolecular film were prepared on the copper plates, and excellent dropwise condensation of steam was formed on the surfaces, respectively. The heat transfer coefficients of dropwise condensation on these treated surfaces are more than 30 times higher than that of filmwise condensation on a bare surface.