Historical Cultural Layers and Sustainable Design Art Models for Architectural Engineering—Took Public Art Proposal for the Tainan Bus Station Construction Project as an Example

The concept of “historic buildings” is cultural with evolutionary characteristics, mainly constructed in the category of historical culture and people’s living settlements. “Public art” is an artistic asset with aesthetic attributes in urban living spaces. It contains two connotations, “cultural landscape” and “cultural route”, which form an artistic symbol of urban architectural space at the same time. Along with the progress of an urban renewal plan, a local culture characterized the urban landscape, making architecture a tool used to convey cultural identity spatially. Two coexisting issues can be seen through the accumulated structure and long-term changes of historic buildings, a region’s appearance, and the content of the traditional architectural styles—cultural value preservation and modern urban renewal—which ferment and generate decision-making discussion of design subtly in every corner of a city. This study examines the extant literature and the design model of public art landscape setting to construct a design model that balances the cultural value of historic buildings, and the landscape of public art has been proposed as a result of this study.