Social marketing is a discipline promoting voluntary behaviour change in target audience to effect societal and individual benefits by applying commercial marketing strategies. Considering the UNFCCC mechanisms are established to foster voluntary cooperation of parties of the Paris Agreement (2015) in achieving their emission reduction targets and adaptation goals, potential for social marketing playing a critical role in contributing to the context seems endless. The Climate Technology Center and Network (CTCN), established in 2013, is an operational arm of the Technology Mechanism (TM) introduced by the Conference of the Parties (COP) under the United Nations Framework Convention on Climate Change. With the purpose of pursuing impactful mitigation and adaptation technology transfer based on global cooperation ontology, the CTCN supports technical assistance (TA) to developing countries on climate technology issues. Nevertheless, the participation rate of the domestic members in the CTCN TA project is low at 7 per cent. With this regard, little has known about what government support would benefit the Network members most, therefore, contributing to the global climate change issue. This research aims to respond to these calls. Three sequential studies outlining 4P strategy development were conducted. Study 1 conducted an online survey to identify pricing factors influencing participation of climate technology transfer business (RQ1). Study 2 tested four different types of government support program that will is most likely to encourage the Network member’s CTCN TA participation (RQ2). Study 3 pilot tested the most appropriate government support program, including a new communication strategy (RQ3). This research has taken climate technology experts’ perspectives in order to enhance the participation of 81 Korean Network members in climate technology projects. This paper contributes to applying the social marketing approach in expanding climate technology assistants globally, thereby purposefully bringing new theoretical and practical insights affecting the mitigation of carbon emissions and increasing the adaptation to climate-related disasters in developing countries.