Objectives To study the value of choledochofiberscope in treatment of residual intrahepatic stones and the outer scope expression of comet sign.

Abnormal changes in hepatobiliary excretion function in cholelithiasis can be showed by hepatobiliary scintigraphy. ROI and TAC can improve the diagnosis rate of early biliary tract obstruction.

Conclusion Intraoperative choledochoscopic technics is useful to decrease the residual stone rate and the recurrence rate, and helps to choose the proper methods of operations.