This paper researched and constructed residuation implication operator of intuitionistic fuzzy T-norms.

A new operation decision-making algorithm based on intuitionistic fuzzy sets;

Multiple attribute decision making method based on intuitionistic fuzzy sets;

The Relations between Both-branch Fuzzy Sets and Intuitionistic Fuzzy Sets (I);

Rough communication based on intuitionistic fuzzy set;

The theory of intuitionistic fuzzy set expands the expression ability of classical fuzzy set,which can provide a new method for the problem of emitter threat evaluating.

The fuzzy multiple attribute decision making problems are investigated,in which the attribute values are given as intuitionistic fuzzy numbers and the preference information on alternatives can be provided by decision maker.