The Jia Ying Guan Imperial Stele is an imperial inscription commissioned by the Yongzheng Emperor of the Qing dynasty to commemorate the regulation of the Yellow River and the construction of Jia Ying Guan. Made with a bronze surface over an iron core, the stele embodies historical, calligraphic, artistic, and political value. Using this stele as a case study, this article combines textual research with object-based analysis to examine the symbiotic relationship between Yongzheng's philosophy of governance and his calligraphic art. It reveals how he employed calligraphy to convey moral and political ideals and used art to support governance and public instruction. The inscription records the Yellow River floods and the hardships of river regulation. In calligraphy, Yongzheng drew on the model-book tradition of Wang Xizhi, Wang Xianzhi, and Dong Qichang, forming an imperial style marked by both archaic elegance and strict formal discipline. In political thought, the stele reflects his core principles of people-oriented governance, reverence for divine power, diligence in serving the people, and consolidation of imperial authority. In craftsmanship, its composite casting technique of an iron core and bronze surface demonstrates Qing ingenuity in structural stability, corrosion resistance, fine carving, and water-level monitoring. This study highlights the stele's multiple values and offers a new perspective on the integration of Yongzheng's river management, calligraphic art, and political thought.