In the framework of the FIRE PARADOX European project we have to define a public awareness strategy concerning a new management of wildfires. This strategy relies firstly on the identification of stakeholders and communication flows. To grasp the complexity of the topics we construct a first information system and then we propose to enrich this information system so that it could allow the analysis, the validation and the organization of the information exchanges, in order to create attitudes and behaviours in favour of general interest. So, this decision-making information system could be a socio- organizational support of communication, based on systemics. This theoretical choice permits one to approach the transverse structure and the multidimensional conception of the decision-making information system.