In the post-pandemic period, "quarantine" reduces the nature-relatedness of the public, a social problem that urgently needs to be solved globally. Related researchers point out that the public is more connected to nature and healthier physically and mentally. However, few studies have investigated the mediators that enhance nature-relatedness. From the perspective of innovation and sustainable development of public art, this study explores the specific schemes of ceramic public art to enhance nature-relatedness. From the design dimension of ceramic public art, it is found that modelling, composition, decoration and spatial language are indispensable factors in enhancing nature-relatedness, and we are committed to finding specific design solutions. A mathematical model correlation library between design dimensions and perceptual intentions is constructed through Kansei Engineering and Quantization-I theory. The results show that public art with "close" and "functional" perceptual intentions greatly enhances nature-relatedness. The corresponding design categories are: "rotary and curved", "momentum and visual conflict", "painted decoration", "glaze decoration", "organize space". In terms of sustainable design strategies, this study proposes that public art should combine environmental, aesthetic, and social value for innovative design. The research results can help managers of urban ecological planning and planners of public art effectively identify the relevant elements of public art to enhance nature-relatedness. We should also increase the public's current needs analysis, combining sustainable design with the post-epidemic period to make a theoretical contribution to global propositions.