Abstract: In this paper,aiming at aggregation question based on group decision making and a sngle decision making, the theory of entropy is applied to the set pair analysis The notion relation entropy and transferable entropy of a system is put forward The character is studied Potential of the relation entropy and transferable entropy are defined, which is the consistency measure on the group decision and single decision making A new aggregation effective definition on the group misjudge is obtained.

Key words: group decision making, a single decision making, entropy