The construction of the old urban areas is closely related to urban development. Problems are common in old urban areas in China, such as water logging, lack of green space and poor space environment. Sponge city construction is an effective measure to adapt to the rapid urban development and solve a series of problems in the old urban areas. The renewal and transformation of sponge cities in old town is problem-oriented and people-centered. It proposes sponge city renewal strategies such as “systematic” pattern, “acupuncture” implant and “demand-oriented” design to alleviate urban water logging from the source, reduce urban runoff pollution load and improve urban ecological environment. At the same time, green facilities complement gray facilities are in line with the requirements of the national dual-carbon target which effectively controls the “urban disease” of the old urban areas through sponge city.