Four-dimensional ultrasound diagnosis of fetal congenital malformation disease mainly includes fetal facial and other malformations, amniotic fluid volume, fetal basic physical condition and other aspects. 1. Fetal facial and other malformations: such as cleft lip and palate, syndactyly, cleft lip, short limb deformity, tetralogy of fallot and so on. 2. Basic physical condition of the fetus: for example, for the neurological system, the fetal brain and neurodevelopment can be examined, including screening for anencephaly, microcephaly, spina bifida, hydrocephalus cerebrospinal bulge. Digestive system, e.g. visceral ectropion, megacolon. As well as urinary system screening, such as giant bladder, polycystic kidneys, hydronephrosis, and urethral obstruction. If a pregnant woman needs to have a four-dimensional ultrasound maternity test, she needs to go to a regular medical institution to have the test and learn about the development of the fetus in time.