Mill was an illustrious spokesman of liberalism in the 19th century. In his book, "On Liberty", Mill made strong arguments for the genuine meaning of freedom, freedom of thought and speech, freedom of personality development, social power and freeom, and so forth. The key points of this book have important inspirations for child education in terms of goals, teaching, right of education, and cultivation of elites. With the results securing from analyzing his major arguments, some impontant for child education are stated as bollows: 1. Development of personality as the goal of child education: providing a supporting free environment for teaching; affirming the rule of freedom for teachers and pupils and catching suitable opportunities for feedback to errors. 2. Ideas and approaches for adaping teaching: emphasizing individual differences in teaching methods; stressing on the cultivation of interest in teaching process. 3. Children's right of learning: protecting children's right of learning; enhancing parent's responsibility on education; clarifying the idea of deschooling and assuring the implementation of compulsory education. 4. Advocacy of elite education: stimulating children's creative thinking; letting children practice the life of democracy and law; and endowing freedom and teaching context with variability.