In this study, action research was adopted in the process of implementing the game sense model in high school physical education, taking the 3x3 basketball program as an example. The physical education teacher who was the researcher has applied three cycles of plan, action, reflect, and refine. Participants were included the teacher and 29 students from senior one of secondary school, 19 boys and 10 girls (age 16-18). Data collected by different prospective (triangulation and trustfulness) from teaching logs, observers’ record sheets, video observation, student logs, and focus group interviews during three cycles. Results showed that “Game replaced Teach” could fully be applied in the 3x3 basketball program and taken advantage of variety of teaching activities to stimulate student teamwork and creativity. Second, the researcher was able to enhance student understanding of the 3x3 game and strategies to promote basketball in their school; third, the researcher, as a teacher himself, was able to have professional growth and encourage problem-solving skills. The researcher recommended that all the secondary schools should promote the game sense, and hence to stimulate student motivation and participation. For further study, suggested adjusting the rules of the games and adopt in a team sport in the first place, then move forward to apply to various sports, and the teacher could adjust the game based on the student ability.