With the development of the digital economy in China as its background, the book introduces the current development status and trends in various stages of the digital economy, from academic research to industrial application. In the meantime, based on the development trend of the integration between the digital economy and industries, it analyzes critical topics in social and economic development, including the online economy, industrial digital transformation, digital sharing, and digital currency. The book also explains and discusses fifteen new models of digital economic development that drive industrial transformation and upgrading so that government management personnel, industry operators, and students can understand and effectively utilize related fields. The book closely follows the core ideas of the national “14th Five-Year Plan” to expound on the new models of digital economy driving industrial transformation. This is highly consistent with the fundamental direction of China’s industrial transformation and upgrading, making it a work integrating decision-making, academic theories, and development.