The book publishing of modern Chinese libraries is a Socio-Technical Interaction Network (STIN), which, together with other STIN, forms a larger STIN. On the basis of describing the laws and regulations related to libraries and publishing in modern China, this paper constructs and analyzes the STIN of book publishing in modern Chinese libraries, and point out that these laws and regulations are a kind of “social technology”, that is, the social elements of this network; it, along with other social elements and various natural technological elements, constitutes the “broad technology” of book publishing in modern Chinese libraries.