The purpose of this study was conducted to indentified the fixing quality of $CO_2$, the most important greenhouse effect gas, by microalgae Chlorella ellipsoidea in batch test apparatus. The glass flask of $1.4{ell}$ culture media which was saturated with 99.99% pure $CO_2$ gas was setted water bath of $25^{circ}C$, 5000Lux, and seeded 100$mell$ algae liquid. We checked the change of inorganic carbon concentration and algae population with time in culture media. The result were next: the growth of algae population relied on aquatic IC(inorganic carbon) concentration. And the pH was increased with decrease of IC concentration. The growth of algae population had positive correalation with $CO_2$ concentration, and the coefficient of correlation was 0.982. The specific growth rate($mu$) of Chlorella ellipsoidea was 1.104/d, the maximum specific growth $rate({mu}_{max}$) of 9.21/d, and helf velocity constant($K_s$) of $259mg/{ell}$ by Monod equation.