Signage system is an important part of urban infrastructure. Excellent signage system design not only has humanized practical functions, but also helps to convey the city culture, and enhance the overall image. At the same time, signage system design has a certain role in promoting the construction of Hangzhou as a fashion capital. We summarize the positive effects of signage system on the construction of a fashion capital, study the application strategy of West Lake signage system in Hangzhou, and explore the future growing of signage system. With the development of 5G, AI and other new technologies, integrating them into the design of the signage system and building an intelligent signage system that meets the needs of the times and sustainable development is an important direction in the future.