Malaysia announced to reduce emission during the 15th Conference of Parties in Copenhagen 2009 by 6th Malaysia Prime Minister YAB Dato’ Sri Mohd Najib Tun Abdul Razak. While, one of the major energy consumption and emission producers are port systems. Therefore, port must minimise emission and pollution, to become green and environmental friendly. Thus, this study looked for the external environmental factors that influencing port become green. The external environmental factors determined using PESTEL analysis; there are political, economic, social, technology, environment, and legal. Next, the priority dominant external environmental for main factors and sub-factors identified using AHP analysis (Analytic Hierarchy Process). Questionnaires used to collect data from expert, and generated from literature review and pilot test. The initial results showed that the first priority main factor is economic, the second priority main factor is technology, and the third priority main factor is environment. At the same time, the results also highlighted that the first priority sub-factor is economic growth, the second priority sub-factor is reduce pollution, and the third priority sub-factor is research and development. The CR (Consistency Ratio) value is less than 0.1 and indicated that the data is considered acceptable. The advance and green technology and system revolution require financial support, and the Environmental Kuznets Curve (EKC) highlighted that people will looking for environmental protection while economic output per capita achieving certain turning point. Thus, the economic growth is significant contributed and influenced Malaysia Port to become green and environmental friendly.