With the surge of maritime trade and the development of port infrastructure, the pollution of the environment by shipping activities is becoming more and more obvious. Therefore, this chapter discusses the research progress of ship carbon emissions and makes an in-depth analysis of the green port initiatives at Xiamen Port. At present, the measures for the green initiatives for ships at ports are mainly divided based on three aspects: alternative fuels, onshore power supply, and policy improvement. All three aspects have different perspectives. Most scholars put forward emission reduction measures for onshore power supply and alternative fuels, whereas policy improvement is viewed as a comprehensive embodiment of these two groups of measures and also the basis for the development of green ports. This study evaluates the effectiveness of these three aspects and analyzes the existing green initiatives of Xiamen Port according to these three aspects. The importance of Xiamen Port in the cruise shipping network is assessed as well. In addition, the economic and social benefits brought by the green initiatives at Xiamen Port are evaluated in detail. Finally, a set of constructive recommendations are proposed to facilitate the green transformation of Xiamen Port. These recommendations focus on monitoring of ship emissions, green shipping infrastructure development, improvement of green shipping policies, financial incentives, and collaborative initiatives.