From August through September 2013, the author, financed by the Ministry of Culture, Youth and Sports of Brunei Darussalam, has done an experimental research for a quite new model of sustainable community development named Professional Volunteering-Based Tourism (PVBT) in Kampong Speu Province and Kandal Province (Cambodia). Owing to the pilot study’s good results, it can be seen that PVBT is definitely a highly feasible community development form and greatly benefits the local people. Unlike other current tourism forms (e.g. community-based tourism, ecotourism, etc.), PVBT can help maximize the positive environmental and socio-economic effects, and minimize the negative ones in the destinations where the host communities, visitors, and local organizations, tourism enterprises and youth unions, for example, interact. In this paper, the author describes what such the model is, how it is organized, and points out how it can be beneficial to both local communities and participants, with a focus on the two provinces in Cambodia.