Cloud computing is one of the fastest growing areas of the IT industry, with the continuous advancement of the digitalization process and the impact of the epidemic, the global cloud services market is undergoing rapid, systematic change, in which the SaaS (Software-as-a-service) market has ushered in explosive growth in recent years. China's SaaS market started late, compared to the global leader in the United States, SaaS industry development lagged behind by about five years. Book SaaS refers to the design of online shopping malls for publishers' books based on software systems, realizing the functional upgrading of books, serving readers with rich and continuously iterative functions, and further promoting good interaction among authors, editors and readers. By the end of 2021, there were 587 publishing houses in China. China's SaaS service book is currently a small market size, but from the outbreak of the epidemic in 2020 to the present, the epidemic accelerated the digital transformation of enterprises, China's book SaaS market has entered a critical growth period, with a compound annual growth rate of more than 50%. 2022 China's book SaaS market size of 2.09 billion yuan, a year-on-year growth of 67.2%. The market size is expected to reach 3.66 billion yuan in 2023, a year-on-year growth of 75.12%.