At present, coastal cities are changing toward information, intelligent, ecological, and other directions, which requires urban design with various complex factors. Through effective urban design, resources can be effectively allocated, balancing economic and environmental development, which is an important means of tourism development in coastal cities. The regional natural and cultural characteristics should be analyzed, because they are important factors in planning and design cases. At present, the functions of coastal cities will become more and more complex, requiring the construction of city characteristics, space humanization, and so on. Urban design is the overall design of the complex system of the city, which pays more attention to the framework creation and the guidance of urban development. Urban design is a multisolution process and a continuous basis system that will feed back dynamic urban governance, which is a professional category that comprehensively deals with system element relations, public value orientation, and high-quality urban environment concepts. The basic concept of urban design consists of mixed functions, land use, public transport, public vitality creation, and medium- and high-density urban texture, which has gradually become a consensus. This paper analyzes the key methods of urban design, which will be an important reference for the planning of coastal city tourist areas.