In the dual context of global urban competition and the construction of a cultural powerhouse, art cities have become a core direction for the breakthrough development of historic cultural cities. To address the "elitist limitations" and "heritage conservation dilemmas" of Suzhou garden aesthetics and to promote its empowerment in the construction of art cities, the work aims to conduct a research based on the perspectives of life aesthetics theory and design practice. Focusing on the coupling relationship between the everydayization of garden aesthetics and the construction of art cities, the life aesthetic endowments of Suzhou gardens in the spatial, cultural, and ecological dimensions are systematically analyzed. The transformation of garden aesthetics in urban space, daily objects, and interactive experiences is sorted out and an innovative paths for constructing a "point- line- plane" garden aesthetic system, shaping an ecologically integrated landscape pattern, and stimulating social co- creation vitality is proposed. The results indicate that garden aesthetics, through design translation, can transform from a "walled heritage" to a "living asset," thereby constructing a linkage mechanism between life aesthetics, urban residents' lives, and the art city. This provides a solution for the construction of Suzhou as an art city and offers a reference for the revitalization of cultural resources in similar cities.