The height of a one-year-old eight-month-old male baby is 79.4～85.4cm, and his weight is 10.3～12.7kg. Combined with the growth and development curve, we can comprehensively determine whether the baby’s growth and development is normal. The formula for calculating a baby’s height: height (cm) = age x 7 + 75, weight (Kg) = age x 2 + 8. The height of a one year and eight month old male baby is usually 79.4 to 85.4cm, and his weight is 10.3 to 12.7kg. A baby’s height and weight are affected by congenital and acquired factors, such as the height and weight of the baby at birth and the height and weight of the parents, which have an effect on the baby’s present height and weight. Acquired factors, such as nutritional status, sleep and diseases, also have an effect on height and weight. The growth and development of a baby is a continuous process, which should be judged in conjunction with the current height and weight, as well as the growth value of the baby’s height and weight. Therefore, babies should have regular medical checkups, and if they are found to deviate from the growth and development curve, they should be seen by the pediatrician in a timely manner, so that the cause of the disease can be clarified and targeted treatment can be taken.