Under the premise of strengthening protection, urban infrastructure construction should be carried out and organically integrated into the modern atmosphere of life in order to revitalize ancient cities, make people remember history and nostalgia. In the process of urban renewal, how to protect historical and cultural relics and integrate traditional and modern development is an important issue. In Dongcheng District, Beijing, the courtyard with blue bricks and gray tiles, and the quaint and elegant alleys are filled with profound cultural heritage. In Chaozhou, Guangdong, the display of intangible cultural heritage techniques such as wood carving, Chao embroidery, and hand drawn clay pots has become a regular activity at Guangji Bridge. In recent years, many places have insisted on placing equal emphasis on protection and development in the process of renovating old cities and developing new ones, and have made beneficial explorations in continuing the historical context of cities. The historical and cultural relics of a city are the accumulation of the wisdom of its predecessors, and are important symbols of the city's connotation, quality, and characteristics. By the end of 2022, the urbanization rate of China's permanent population has reached 65.2%. From the perspective of urban development laws, urban development during this period often faces "urban diseases" such as aging infrastructure and poor living environment in urban villages. Implementing urban renewal, promoting the renovation of old urban communities, the construction of complete communities, and the renovation of infrastructure are inevitable requirements for adapting to the new situation of urban development and promoting high-quality urban development. At the same time, it should also be noted that urban renewal does not equate to large-scale demolition and construction. In the past, some cities have experienced situations such as demolishing old buildings and destroying traditional styles, which not only severed the historical context of the city and cut off residents' nostalgic memories, but also created new urban problems. The Notice on Solidly and Orderly Promoting Urban Renewal issued by the Ministry of Housing and Urban Rural Development clearly requires that "the traditional pattern and texture of streets and alleys in old urban areas should not be disrupted, and historical buildings and old buildings with protective value should not be arbitrarily relocated or demolished". It is precisely to guide various regions to implement urban renewal actions in a very stable manner. Only by protecting well can we make good use of it. For urban historical and cultural relics, they should be fully preserved in order to better showcase the unique features of the city. From the perspective of elements, what needs to be protected is not only tangible individual buildings, streets and neighborhoods, but also intangible intangible cultural heritage, such as the mulberry silk weaving techniques in Zhejiang, Kunqu and Guqin arts in Jiangsu, and Li ethnic brocade in Hainan. These intangible cultural heritage are not only cultural elements that nourish the local cultural heritage, but also important resources that activate the vitality of the city. From a temporal perspective, we not only need to protect ancient historical and cultural heritage, but also protect modern and contemporary historical and cultural heritage and important construction achievements. Only by achieving full coverage of space and full inclusion of elements can a city's historical style be presented at multiple levels and in all directions, avoiding the phenomenon of "a thousand cities facing one side". Activation and utilization are necessary to stimulate internal vitality. Due to its long history, many historical neighborhoods have relatively outdated supporting infrastructure and public service facilities, making life more inconvenient for elderly residents. Strengthening the protection and inheritance of historical and cultural heritage in urban renewal can be achieved through small-scale planning