The main purpose of this research is to explore the effects of sports spectating on self-esteem through the identification of players for the 5th and 6th grade students, and to understand whether the self-esteem development of the children would influence the effects. The research is conducted by mixed methods with an experimental design, qualitative interviews, focus groups, observation and survey. From an elementary school, 30 participants were recruited. They were interviewed and surveyed to understand their self-esteem develompent and experiences in watching sports cartoon. Then, the participants were divided into 5 groups to watch the sports cartoon “Young Boys Baseball Story.” The participants answered the Rosenberg Self-Esteem（RES）scale（1965）before and after watching sports cartoon. The two scores were compared. After watching the film, the participants were also interviewed about their experiences in wtaching the film. The results showed that students had the self-esteem experiences in watching sports cartoon.The students had identified with players in watching sports cartoon. The level of identification was positively related to the self-esteem experience. The higher the identification, the stronger the self-esteem experience. The self-esteem development might influence the identification and self-esteem experiences and their relationship. The sports cartoon could be good teaching materials in schoool to promote self-esteem.