In removing a huge abdominal mass, we often observe acute hemodynamic changes, For adequate anesthetic management we must carefully observe CVP, MAP, ECG and pulse rate ect. The authons report an an anethetic experience in the removal of huge a ovarian cystic mass. The patient was 29year old female. Under contianous monitoring of CVP, MAP, ECG, pulse rate and fluid administration, the patient tolerated the anesthetic period well. The total weight of the tumor mass was about 34kg, which waa composed of 30L cystic fluid and 4kg of solid maas.