It is more common for babies to fail a hearing test two days after birth. If a hearing test is not passed, there are two more chances to test, but it is important to review the test regularly so that the diagnosis is not delayed. A baby’s hearing test can be affected by many factors, such as the surrounding sounds, such as the child’s cooperation, crying, activities, cerumen in the ear, all of which will have a certain impact on the hearing test. Therefore, the baby’s hearing test will be conducted at the initial screening on the second to seventh day after birth, and if it fails, it can be rechecked on the forty-second day and at the three-month mark of the baby’s birth. If the review fails, a three-month diagnostic hearing test is needed, and further tests such as brainstem auditory evoked potentials are performed in the hospital. While the instruments are being tested, parents should also pay attention to their baby’s movements, observing how the baby reacts to sounds and shakes his/her head. If hearing impairment is finally diagnosed, then appropriate measures should be taken, such as physical therapy, surgery, cochlear implant wearing, and hearing and speech rehabilitation training.