Abstract : Territorial Intelligence is a relatively recent concept in France. We identified it, as conjugation of Economic Intelligence and Knowledge Management actions applied to a territory. Territorial Intermediation is a particular form of it, which is based on the notion of mediation and use of human intermediary(ies). We participated in the setting of a kind of these systems, in it the human intermediaries are notably in charged with informational problem resolution for others. Our works searched to improve the efficiency of these individuals to resolve the Informational Retrieval Problem (IRP), which they are asked. In this goal, we got our inspiration from Human Communication, Knowledge Representation and Problem Resolution domains. We deduced from that a four folds solution: (1) a good expression Principles, (2) an IRP questioning Model, (3) a translation Tool for subject interpretation, (4) a Relevance of information oriented to IRP expression.