Abstract: Activated carbon was prepared from endothelium corneum gigeriae galli ( ECGG) by preliminary carbonization at 450 ℃ and final KOH activation at high temperatures( ECGG-800 ℃, ECGG-900 ℃ and ECGG-1000 ℃ ). The surface and structural properties are analyzed with SEM and BET. And then selected ECGG-900 to draw its adsorption isotherms about acidic and basic dyes, the adsorption isotherm data were fitted by the two most used models, the Freundlich and Langmuir models. Results show that adsorption isotherm to acid fuchsin is best fitted with Freundlich model , while methylene blue is more accord with Langmuir model. The adsorption capacity of acid fuchsin and methylene blue reached 1.682 g/g, 2.045 g/g. As the adsorption time sessions, three kinds of activated carbons removal rate of dyes also immediately increased. It can be know from the foregoing that the Endothelium corneum gigeriae galli activated carbon can achieve a best effectiveness for removing the acid fuchsin and methylene blue in the water solution and it is a potential adsorbent.