In all models of creation of objects, products or development, it is essential today to consider a sustainable development and eco-design dimension and give value to each project created. \nIn addition to factors related to optimization of resources, the use of materials and minimizing waste, it is important to be attentive to the parameters of comfort and use. Designers need to expand their environmental knowledge, develop co-creation and be open to the inventiveness of citizens in a multi-disciplinary environment. To assist design teams in creative session or small businesses in the development of their product, we propose a methodological approach that will allow to guide potential users to eco-innovative product, space or process concepts. As a starting point, an overall qualitative and multi-criteria matrix will allow impact assessment and its prioritization. An application, based on inventive principles will be adapted and complete the reflection for the choice of an eco-innovative solution.