Sponge City is the concept of urban water circulation system that allows rainwater to be absorbed, penetrated and purified in the city, in terms of urban regeneration. The concept was first raised in China's ῾low-carbon city and regional economic development science and technology forum᾿ in 2012, which highlighted the importance of sponge cities. However, sponge-type urban parks, which play an important role in sponge cities, lack content on design principles that are applied in practice other than general concepts. Therefore, this paper was promoted by the city of Sanya, a pilot city of Sponge City in China, and ῾Shuangshu (urban restoration and ecological restoration)᾿ and ῾Shuangcheng (a comprehensive pilot city of sponge city and comprehensive plumbing management construction)᾿. The project Sanya City Wetland Park was selected for research and fieldwork was conducted on seven sponge-type urban park design principles extracted through prior research. In addition, interview survey and analysis methodologies were applied in three groups: citizens using the target site, government officials in charge of government construction, and park managers. The results of the study are as follows: It has been analyzed that the Dongan Wetland Park is building a fairly good connection in terms of connectivity. In terms of function, there is no spatial design that takes into account young people and children, so a design approach that takes into account all age groups should be applied. It is also analyzed that in terms of infrastructure facilities, parks need more rest and amenities. After analyzing the sponges, the Jando Bridge and the cascaded flood control dam were constructed, creating a good flood control low-flow facility. Finally, it can be seen that from an economic perspective, the maintenance and protection of the park requires at least 80 maintenance personnel to be considered to maintain it. At present, the Sponge City in China is still in the exploratory stage and still needs to explore mass practicability. In other words, the basic design principles of seven types of sponge-type urban parks, including connectivity, functionality, ecology, locality, safety, sponge urbanity, and economics derived from this study, could provide basic data not only for existing sponge-type urban parks but also for future sponge-type urban parks.