This paper explores the innovative integration of Augmented Reality (AR) technology into font design, emphasizing the user experience, visual performance, and spatial experientiality of AR interactive fonts. Central to this investigation is the deployment of AR-based calibration technology, which establishes a spatial coordinate system specifically for AR fonts. When synchronized with the camera model, these virtual fonts are seamlessly registered within real-world scenes. To enhance user engagement, gesture interaction design is incorporated, enabling interactive functionalities within the font system. The effectiveness of this design is evaluated through user testing, where the interactive performance is assessed based on audience experience post-implementation. The findings reveal that interactive fonts are highly effective in content display, achieving a user acceptance rate of 0.7659, and in content retrieval systems, with a rate of 0.7404. Audiences demonstrated a preference for conducting operations independently and showed a particular inclination towards font performance-based projects. The study concludes that the interactive font design project, which leverages augmented reality and gesture interaction technologies, holds substantial commercial potential.