Abstract: The properties of materials are fundamentally determined by their electronic structure. As a core component of undergraduate Solid State Physics courses, band theory serves as a crucial theoretical framework linking the microscopic behavior of electrons with the macroscopic properties of materials. Although the theoretical system of band theory is well-established, current textbooks generally lack corresponding experimental content. As a result, students often struggle to intuitively grasp key concepts such as the Fermi surface, density of states, Fermi velocity, and effective mass. Angle-resolved photoemission spectroscopy (ARPES), an important experimental technique in modern condensed matter physics, enables the direct observation of a materials electronic band structure and offers visual support for the teaching of band theory. This paper proposes the integration of ARPES fundamentals and a simplified experimental module into undergraduate instruction, aiming to establish a unified Theory-Experiment Application teaching framework. Through a combination of experimental demonstrations, data analysis tasks, and theoretical extensions, this approach seeks to spark student interest, deepen their understanding of electronic structure, and promote the integration of theoretical learning with experimental practice. This effort not only broadens and enriches the content of physics education but also offers a practical path for building a synergistic model that connects frontier research with undergraduate teaching.

Key words: band theory, electronic structure, angle-resolved photoemission spectroscopy (ARPES), experimental teaching, teaching reform