Ultrasound examination of the liver and gallbladder is recommended to go to the regular hospital, under the correct operation of the doctor. Ultrasound examination of the liver is performed by placing the ultrasound probe on the abdominal wall of the patient’s liver area, usually on the main viewed section, such as placing it on the main section of the tumor. Ultrasonography of the gallbladder is performed under an empty stomach, using an ultrasound probe in the gallbladder region of the abdomen to examine gallbladder lesions. It is commonly used to diagnose disorders of the gallbladder and biliary tract system, and can also be used for ultrasound-guided cholecystocentesis drainage in acute cholecystitis where abdominal surgery cannot be performed. In addition, before doing liver ultrasound need to fasting at least 8 hours, if necessary, exhaust, catheterization, pelvic organs before the examination to hold urine to fill the bladder, ultrasound on the day of the barium meal contrast and gastroscopy can not be carried out, in order to avoid gastrointestinal contents, gas interference with the image. Gallbladder ultrasonography also requires food fasting for more than 8 hours to ensure that the gallbladder and bile ducts are filled with bile.