This proposition is a case study who aims to demonstrate and discuss the adoption and development of FOSS GIS tools and open standards at Brazilian Institute of Environment and Renewable Natural Resources (IBAMA) in the Remote Sensing Center (RSC) who is responsible for collecting, analisys and distributing of GIS data of brazilian biomes (Amaz™nia, Cerrado, Mata Atl‰ntica, Caatinga, Pampa, Pantanal and Manguezal), using FOSS tools like Quantum GIS, PostgreSQL/PostGIS, GeoServer, pgRouting, OGR/GDAL, Leaflet.JS, OSM and others.In recent years FOSS GIS has become an important part of brazilian enviromental conservancy system.Working with FOSS and open standards, the Remote Sensing Center at IBAMA is developing tools to help conservation of the environment and brazilian forests. Systems like the Emergency Environmental System (EES), which helps to identify and warn about environmental disasters.Other systems, in development at Remote Sensing Center at IBAMA, using a large open database of geospatial data, shows data on deforestation in the major biomes in Brazil in real time.In 2014, the Remote Sensing Center team began collaborating with others projects, giving back contributions to the FOSS community. With source code, bug reports, translations, and mostly with free and open data about brazilian enviroment and Natural Resources.