The results of experimental and theoretical studies of acetone, methanol and their mixture adsorption by activated carbon were presented in this work. The equation of Langmuir, Freundlich-Langmuir, Toth and Dubinin-Astakhov were used for correlation of the experimental data for pure components. Experimental data for mixture adsorption equilibria were compared with predicted applying Langmuir, Freundlich-Langmuir, Dong-Yang models and ideal adsorbed solution (IAS) theory.