Laparoscopic hepatic cyst opening and drainage has become the first method for the treatment of hepatic cysts, and its short operation time, fast patient recovery and less pain have been accepted by most of the surgical colleagues, and it is widely carried out even in primary hospitals. However, with the increase in the number of surgical cases, many drawbacks have been exposed. The cysts in deep or hidden areas are missed; there is a fear of damaging blood vessels or the bile duct opening is not large enough, resulting in failure of cyst drainage surgery. The laparoscopic ultrasound probe used in our department can clarify the cyst site and the relationship with surrounding bile ducts and blood vessels, find the weakest point of the cyst and liver surface while avoiding blood vessels and bile ducts, open the window for drainage thoroughly, and reduce the risk of surgery to the lowest level, especially in hidden areas of the cyst can avoid the danger brought by blind puncture. The use of laparoscopic ultrasound probe also avoids the consequences of not finding the cysts and the need for intermediate open abdomen. The laparoscopic ultrasound probe can be used not only for liver cysts but also for the localization and diagnosis of other abdominal lesions such as biliary tract stones and tumors, abnormal biliary tract anatomy, pancreatic tumors, tumors of the gastric wall and intestinal wall, etc. It is an important tool for laparoscopic surgery to be widely performed.