This book primarily focuses on the coordinated development of port groups and the environment. It extensively reviews relevant literature and draw on existing theoretical research achievements to analyze the mechanisms and influencing factors behind the formation of green, ecological, or energy-saving ports. It employs attribution decomposition analysis and LMDI decomposition methods to identify driving forces and factors for low-carbon ports. Furthermore, with the goal of minimizing the comprehensive cost of low-carbon port investment and considering constraints such as the upper limit of low-carbon investment in ports, the book utilizes tools such as stochastic processes and optimization decision theory to establish an optimization model for carbon emission reduction investment in low-carbon ports, aiming to find the best investment solution. Throughout the process, the book employs a combination of quantitative and qualitative analysis methods and provides corresponding recommendations and suggestions from an industry and port perspective through comparative analysis and case studies.