The purpose of this study was to investigate the level of physical health in early childhood in Korea and to develop policy measures for improving physical health in early childhood through international comparison of physical health level. This will be used as a basic data for establishing policies related to physical health of infants, operation of curriculum considering infant development, and development of guidelines for 24-hour child behavior habits in the international community. In order to conduct this study, we conducted literature analysis, joint international participation in physical activity research (SUNRISE project), analysis of infant and child care cohort DB, online parent questionnaire (2,000), workshop and consultation. The policy recommendations derived from this study are as follows. First, there is a need to improve laws and institutions for health promotion of infants and toddlers. For this, the physical health and physical activity guidelines of infants should be developed. It is necessary to develop a comprehensive and systematic guideline for various behavior habits such as physical activity, sedentary behavior, and sleep of the infant, and it is necessary to establish guidelines for physical activity according to development stages such as childhood. Second, it is necessary to make sure that kindergarten and day care centers have room for play and athletic activities. External physical activity of infants is difficult when fine dust or dust is present. It is necessary to make it mandatory to install an indoor playground and a physical activity space to replace this. Third, it is necessary to strengthen preventive centered parental campaigns and campaigns for children's physical health. In particular, it is necessary to change the direction to a publicity campaign targeting vulnerable groups such as dual-income families, fathers, low-income families, single parents, grandparents, multicultural families and unwed mothers. Fourth. It is necessary to activate the infant physical health promotion program. Various programs should be developed to induce infant interest and to induce practical interest in promoting physical health of infants through long - term application. It is necessary to develop a program and apply it to the field so that physical activity can become a habit rather than an option, so that it can go beyond one time and last for a long time. Fifth, it is necessary to strengthen the capacity of the teachers' physical health and activities, and to support the related personnel. It is necessary to establish the placement criteria for physical activity related qualification teachers or to strengthen the arrangement of health (nursing) teachers so that infants can have sufficient physical activity in institutions and health education. Sixth, it is necessary to practice for physical health of infants at home. Parents should try to prevent media use for their infant children from being watched over a period of time. Parents should also avoid using smartphones when they are with their children. In addition, we should try to have enough sleep time for infants when compared to foreign countries that recommend 10-13 hours a day.