In order for the targets selection of communication countermeasures under uncertain environment, a hierarchical structure to assess targets’ index in communication countermeasures is provided and the influence of the uncertainties is analyzed. An attempt to use interval number to convey the uncertain information is implemented. For the targets are independent one another, the index weigh is obtained by building a deviation function model when the decision make no preference. The model of optimal selection of targets is established based on the possibility and projection. The analysis on an example shows that both methods make available for the optimal selection of targets in communication countermeasures and can serve as a new idea of optimal target selection.