With the development of informatization education, smart classrooms have gradually become the trend of high school information technology teaching. The core of the Understanding by Design (UbD) concept lies in “understanding” and emphasizes backward design, which can provide a new direction for the development of smart classrooms in high school information technology and effectively improve teaching effectiveness. From the perspective of smart classrooms of information technology in high schools in northern Guangdong, this paper analyzes the significance of integrating the UbD concept and proposes specific practical strategies, aiming to effectively improve curriculum quality, help students understand information technology knowledge, cultivate their application abilities, and provide a reference for subsequent information technology smart classrooms.