Compared with traditional teaching service, Web-based learning system is greatly different in many aspects like business model, participants, consumers, technique facilities and etc.; therefore, studying design strategies for Web-based learning system has great significance. The forming process of design strategies for a Web-based English textbook and teaching service project is introduced in this thesis. From the perspective of sustainable design, this article analyzes demands of investors, participants, and consumers thoroughly. On the basis of analysis, originalities of design strategy are created by taking advantage of features of Web technique. This paper also presents design ideas of constructing a product-service system of English teaching, realizing distribution according to functions, realizing self-update of textbook. [ABSTRACT FROM AUTHOR]