This study investigates the implementation process, challenges, solutions, and impacts of the “Height Measurement on The Tree,” a cross-disciplinary and competency-oriented aesthetic program designed for junior elementary school students. The researcher designed this cross-disciplinary aesthetic course by integrating the Hanlin version of the second-grade Chinese textbook with a self-compiled aesthetic course textbook and conducted a six-month teaching session with a group of second-grade Tsing primary school students. This study examines their aesthetic nature by treating the course design and practical experience as works of art. Qualitative research data were collected from students’ learning files, class observation records, feedback sheets, reflection notes, and cross-disciplinary aesthetic teaching curriculum checklists. Based on the analysis and discussion of the data, this study reaches the following conclusions: 1.A cross-disciplinary, contextually adapted course framework with iterative corrections can facilitate the development of cross-disciplinary and competency-oriented aesthetic courses. 2.The issue of limited teaching hours can be addressed through the organic integration of courses, which includes creating an aesthetic experience of life, fostering group collaboration, providing positive reinforcement, and promoting model-based learning. 3.Participation in the ""Height Measurement on The Tree,"" a cross-disciplinary and competency-oriented aesthetic program, significantly enhances junior students’ learning interest and improves learning outcomes. 4.Teachers can advance their professional growth by engaging in professional communities and participating in enhanced programs. Effective course design can overcome the limitations related to scheduling and disciplinary constraints, aligning with actual learning contexts. Teachers can learn to integrate multimedia into their teaching by strengthening their expertise in art. By exploring the teaching process and establishing mechanisms for sharing, more educators can recognize the potential of a new curriculum. Administrators should consider a broader range of feedback to improve the curriculum.