Here, we presented a new method for studing the network of actors, called co-network analysis.It consists of consifering actors as vectors whose components are networks previously constructed by co-word analysis.This enables actors to be linked according to thir similarity in terms of their assignment to the networks, inheriting moreover the centrality and density values that the network possess.In this way, it is possible to construct graphic representations in which the thematically similar actors appear in strategic positions which are also similar. That is, it is an improved combination of the classical strategic diagram of co-word analysis and MDS analysis. It is also possible to establish a generality index of the actors. This technique is applicable to research policies, scientific and technological monitoring, or sociological analysis.