This paper introduces the current situation of the construction and development of China's toy libraries, analyzes the service concent of Seoul Green Toy Library in South Korea and points out four characteristics of construction and service of Seoul Green Toy Library: getting library association's support, diversified services, setting up event brand, and paying attention to readers' needs. And it puts forward that China should establish the national toy library association, expand the service of toy libraries, create featured brand activities and explore the needs of readers.