This paper provides a synthesis of works on relationship between governance and integrity in climate regime and develops recommendations for the policy planners to address the issues in climate regime with special emphasis on the developing nations such as Bangladesh which are more vulnerable to the climate change. The methodology involves analyzing historical data, review of scientific findings and grey literatures in climate change regime including author's own thesis on crop weather modeling.There is no denying the fact that good governance is closely associated with integrating climate change for sustainable development. The Climate Change Governance (CCG) programmer started at International Centre for Climate Change and Development (ICCCAD) in 2013 with main objectives on financing on global and national context. The programmer includes governance challenges within climate change regimes by engaging multiple stakeholders from both government and non-government institutions. The programmer started from Bangladesh and has since then expanded to include broader governance considerations. The integration of academics, government officials, environmental scientists and agronomists as well as grass roots level is considered as crucial for successful implementation of climate change mitigation process. The successful completion of COP21 through the historical Paris Agreement has opened a new vista in climate change regime where all stakeholders share Nationally Developed Contributions (NDCs). Leaders of 175 countries signed on the Paris Agreement on the Earth Day (22 April 2016) in the UN Head HQs. This signifies the seriousness of the world leaders in implementing the Agreement. The paper extensively draws on issues related to climate change in Bangladesh, adaptation and mitigation challenges and post COP 21 updates in relation to Bangladesh as the most vulnerable country. The benefits arising from the qualities and mechanisms of governance (accountability, participation, etc) are enhanced when we ensure the institution's activities and goals are integrated into its surrounding environment. The recent award of "Champion of the Earth" conferred upon Prime Minister of Bangladesh by the United Nations Environment Programme (UNEP) is a recognition of Bangladesh, in being a pioneer among nations in tackling climate change. Bangladesh leads the world in the number of Solar Home Systems (SHS) installed (now well over three million) through a very successful model of public-private partnership of the Infrastructure Development Company (IDCOL) and its franchise model of delivering SHS to millions of customers around the country.Methodology. The methods of research employed in developing this paper includes desk study of relevant literature, articles, essays, conference proceedings and the like materials available in published form in books, peer reviewed materials, journals, magazines, newspapers, printing and electronic media and blogs besides synthesis from own research works.