Climate change is now a term frequently mentioned in many programs, reports of many sectors such as socio-economic, industry, agriculture, fisheries, tourism, etc due to its impacts and effects. Vietnam is one of the countries identified to be impacted heavily by climate change, sea level rise and has been received a number of technical assistance, financiai support of foreign countries as well as international organizations including DANINA (DAnish INternational Development Agency). In this paper, the author discuss about the effects of climate change and natural disasters to the effectiveness of Danish development assistance programs to Vietnam while recommend necessary proposals to deal with those effects. The Danish development assistance programs primarily focus on such areas as agriculture, fisheries, water resources and environment. The analysis and identification of the impacts of climate change will be an important basis for improving the effectiveness of Danish development assistance programs in Vietnam.