Agricultural areas are subject to multiple functions in addition to agricultural production such as recreation, tourism, environmental practices, etc. For periurban areas, the multifunctionality of agricultural areas is now recognized in the planning procedures. But it is still difficult for the promoters to find managementguidelines to preserve the balance between these uses as well as maintaining a "landscape quality". Periurban agriculture is ultimately considered for its value as a space and an available land in terms of urbanization, but what about the opinion of the farmers and owners of agricultural land? The objective ofthis thesis is to propose but also to analyze a participatory method based on the use of landscape representations to foster dialogue between stakeholders, officials, farmers and owners. This device is designed to help actors build their planning intentions concerning the agriculture. To develop this method,we selected two European French speaking territories, with two different management contexts: the town of Billom in France by the implementation of its Local Urban Planning (2006-2008), and the future Landscape Charter of the Natural Park of Attert in Belgium (2007-2009). We assume that landscape representations can be mobilized as medium for dialogue, through a specific methodological system and through participatory workshops. This methodological system can also help the actors to reveal their planning intentions concerning both social, but also the technical (agricultural and urban), relations and representations and to incorporate them into the urban or landscape planning.From the implementation of the methodological system (surveys and workshops) on the both sites in France and Belgium, we built a Methodological Itinerary of Prospective Vision (IMVP) It is composed of five aims of landscape representations uses which relate to: 1. expertise, 2.identification of the participants’ intentions, 3. characterization of the “cadre de vie” from workshops using the method of the negative ...