Childhood is a critical stage in human life, during which an individual's cognitive, emotional, social, and physical development progresses rapidly. Early development is not only essential for children's future achievements but also plays a significant role in societal structure, economic growth, and cultural transmission. Promoting the holistic development of children is the responsibility not only of families and educational systems but also of society as a whole. This study, grounded in Bronfenbrenner's Ecological Systems Theory, aims to analyze how various ecological system levels influence children's cognitive, emotional, and social development, and explores the impact of these systems' interactions on overall child growth. The research encompasses the microsystem (e.g., family and school), mesosystem (e.g., family-school interactions), exosystem (e.g., parental socioeconomic status and work environment), macrosystem (e.g., cultural background and social policies), and chronosystem (e.g., significant life events and historical context). The findings reveal that the interactions between these ecological systems play a pivotal role in children's development and influence their holistic development.