Soils host an enormous biodiversity, both in terms of abundance, number of species and functions of organisms. These organisms and their interactions are fundamental to many soil processes and ecological functions, as organic matter decomposition, nutrient and water cycling, soil structure formation, pest regulation, filtration and biotransformation of contaminants. All those processes and functions can be related to ecosystem services that are of direct benefit to humans, such as food production, climate regulation or provision of clean water. Ecosystem services are quite easily understandable and communicable: the way Nature provides you a service. Very quickly policy makers and even citizens have asked for valuations of ecosystem services provided by land (not only soil). As a consequence several world, EU, national or local experiments have been conducted leading to a great number of publications, the most famous one being the Millennium Ecosystem Assessment. All those valuations have more or less proposed their own definitions and methodologies leading to a wide diversity of results. For more than 10 years several approaches and frameworks were developed by research units around the world to assess soil functions and the related ecosystem services. As a consequence various minimum datasets of parameters were proposed for those assessments including at least soil biological, physical and chemical parameters, but also integrating land use, land management or climate information. Now it appears there is a need to gather all those experiences to provide a consensual methodology to evaluators. Methods and models developed by scientists for investigating and deciphering processes in soils need to be translated into practical and transparent procedures. International standardization is a way to achieve such objective, as the aim is to share knowledge and reach agreement on a document (e.g., standard, guideline, technical report) that can be used worldwide. Having an international common way to assess soil functions and related ecosystem services is crucial to further compare valuations made in different countries, soil types and land uses (from degraded or contaminated land to agricultural or natural land) for management or remediation purposes. ISO/TC 190 has developed from the 1980's more than 180 standards dealing with soil description and soil analysis. Until the 1990's most of the standards were dedicated to the characterization of soil quality regarding fertility in relation to food production. Subsequently, the main emphasis shifted to the analysis of soil contaminants (e.g., trace elements, organic molecules) and their respective impact on soil living organisms (e.g., microorganisms, soil invertebrates, plants). More recently the issues of climate change and ecosystem services were raised. Last year during the plenary meeting ISO/TC 190 asked a group to decide about the need of standardization in the field of ecosystem services. We want to take the opportunity of EuroSoil 2020 to discuss this question with a broad range of research communities, coming from ecology, pedology, climatology, economics, agronomy…: do you think we can reach an agreement on definitions, indicators, models… and by the way will you join us? Come and debate with us so that we may take the decision of starting a new working group within ISO TC 190.