For uniform evaporative crystallization, it is important to appropriately control the degree of supersaturation of each solution position by the evaporation rate. In this study, uniform spherical crystals were obtained by conducting polymer-induced crystallization in the evaporation system of controlled air flow. In the evaporation system, mixture solution of luteolin and ethyl cellulose was evaporated for crystallization, and uniform circular crystals were formed in the order of evaporation. Depending on the degree of volatility of the solvent, the moving rate of the substrate should be controlled. The higher the concentration of the solution, the thicker the crystals were produced. When ethyl cellulose was added, the morphology of the luteolin crystals changed into the form of agglomerated tiny clusters, and the crystallinity decreased. As a result, the crystallization of luteolin in presence of a polymer, which can be used to prepare a unique form of complex crystals, expects various applications of luteolin.