The eel were cultivated in a recirculating aquaculture system (RAS). Result shows that after 159 days cultivating, 10 522 eel survival rate was 99.7%. Total weight was increased to 1 478.0 kg from 584.6 kg. Stocking density was increased to 32.8 kg/m3 from 13.0 kg/m3. Total feed was 1 263.2 kg and the eel weight was increased by 893.4 kg. Feed conversion efficiency was 70.7%. By using adding nutrient solution and low stocking density, the water quality was stabilized after the eel stocking in the system. This method would reduce the risk value of preliminary stocking stage. The water quality parameters in the RAS were as follows: the ammonia nitrogen density 0.03-1.28 mg/L, the nitrite nitrogen density 0.02-0.75 mg/L, the nitrate nitrogen density 1.21-99.60 mg/L, DO 5-7 mg/L, pH 7.0-7.7, water temperature 23.8-32.4 ℃. The water exchange of the RAS was less than 5% in 24 hours. The water quality parameters in the RAS were suitable to eel. The eel dactylogyrosis was prevented and cured by using Chinese medicinal herb and nonpersistent pesticide. In conclusion, the RAS can maintain optimum water conditions to culture eel. This is a green, safe and water saving new culture mode.