Abstract: In the history of Chinese calligraphy, miaotang (the court) and jianghu (the folk) serve as core categories for understanding its historical evolution. Their relationship is not a simple dichotomy but a historical interdependence, dynamic transformation, and genealogical presence. This study reveals that both represent the tension between official orthodoxy and folk vitality, authorized rules and individual expression, as well as canonical norms and innovative breakthroughs. From seal script in the Qin-Han dynasties to contemporary experimental calligraphy, a complete genealogy has formed from the of the style of miaotang to the influence of jianghu. Case studies of calligraphers such as YAN Zhenqing, SU Shi, and WANG Dongling illustrate the dynamic balancing practices between authorized rules and individual expression, as well as canonical norms and innovative breakthroughs.