The changing point of views on values linked to the importance now to protect, preserve and promote natural and cultural heritage influence the quality of life environment in which the man evolves. It has directly an influence on lifestyle, more specific on leisure and touristic activities.The general objective of this Master Thesis is to preserve, protect and promote the Mont- Bellevue Park, located at Sherbrooke (Quebec) by applying Sustainable Development Principles. This urban green park has a big area (197 hectares). Indeed, the ecotouristic development propositions applies values and criteria of Sustainable Development. Furthermore, this Master Thesis answers to a lack of studies on the characterization of the natural and human environment of the Mont-Bellevue Park. For Sherbrooke City, the Mont-Bellevue Park represents a green, infrastructure having an environmental, ecological, social and economic usefulness. It is on this notion of Sustainable City Development that is part of the Sustainable Development Concept, that the research hypothesis is based.The Master Thesis integrates a large range of investigations based on human, physical and biophysical data. Mainly, human data come from a research by written questionnaire and interviews to know Mont-Bellevue Park users habits. Physical and biophysical data were acquired by field investigation, photo-interpretation and thematic maps analysis.The treatment and the analysis of these data identify and localize the information that were presented, organized and synthesised by thematic maps. These data were combined with a sustainable criteria base to map potential sites that can be developed (by thematic attractions) and protected in the Park. A Sustainable Development Concept of the sites was elaborated to emphasize the natural and anthropological attractions of the area.The application of Sustainable Development Principles allows respecting the integrity of the natural environment while meeting the needs and the expectations of Mont-Bellevue Park users and visitors. To give access to these sites, we proposed varieties of thematic circuits plans that connect these sites.