Abstract: The adsorption properties and mechanism of Cu2+ from aqueous solution using the tea dregs was studied In this paper,the adsorption experiments of Cu2+ from aqueous solution using the Taiwan high mountain tea dregs as an adsorbent were carried out.The effects of various parameters such as initial pH, adsorption time,reaction temperature, and initial concentrsations were investigated. The results indicated that the tea dregs had fine adsorption effects on Cu2+ ion. The adsorption equilibrium time was 60 min. And the adsorption efficiency of Cu2+ increases sharply as the reaction temperature increasing.The pH were important influence factors to adsorption and the optimum pH was 4. The adsorption data follow the Langmuir model and the Freundlich model. But the Langmuir model has the better correlation at different temperature.Thermodynamic parameters, including ΔG0,ΔH0,ΔS0 were calculated. The values of ΔG0 at 30,40 and 50 ℃ were negative value, indicating the spontaneous nature. The positive value of ΔH0 reveals that the endothermic nature was existed in the Tea dregs absprption process. The positive value of ΔS0 represents that the tea dregs adsorption is a increasing process for entropy. Also, the comparison of FTIR information after the Cu2+ adsortion on tea dregs with the intitial tea dregs provides evidence of physical adsorption in the adsorption process.