Based on current status of transport energy consumption and carbon emissions in Haikou, considering the economic and social development and the features of harbor city, the transport development goals under low carbon perspective are analyzed. This paper researchs the comprehensive transport system, traffic structure, traffic technology level, and transport equipment, focused on the green port development. The low-carbon transport is adapted with the economic and social development of Haikou, while with the characteristics of “green, accessible, wisdom, and slow travel”.