Climate-Smart Agriculture (CSA) has been widely adopted to achieve food security and support climate change adaptation and mitigation. However, scaling up CSA remains challenging, particularly in developing countries. To scale up CSA, mapping its practices, building capacity, and establishing platforms to share knowledge, and raise awareness have been identified as priority actions. To empower smallholder farmers to be resilient to climate change and catch up with the rapid pace of technological advance in the northern mountainous region of Vietnam, the project adapts CSA concepts to small farmers by identifying and assessing current CSA practices with a citizen science approach (i.e., co-assessing and co-experimenting). Modeled and interpreted through a GIS-based spatial decision support system, champion CSA technologies and practices will be selected that optimally facilitate site-specific climate change adaptation. Farmers participating in the experiment will then use their indigenous knowledge and experience combined with technologies (i.e., apps and sensors) and technical guidance to co-research and test the effectiveness of champion CSA technology and practices. The project also enhance the CSA capacity for stakeholders through workshops, policy briefs, and peer-reviewed publications. The project supports the next generation of CSA experts in Asia-Pacific by providing ample opportunities for early career researchers and students to be involved in project activities.