WeChat Public Number, as a communication model of the new media, produces the new marketing models. In recent years, the WeChat Public Number has become popular, but its successful marketing has been really uneasy. In this paper, the “logic thinking”, a successfully case is taken for example and some methods such as literature search and case analysis, etc. are adopted to start from the brand images, unique contents and communication objects to analyze the “logic thinking” public number and build the brand marketing strategy.