For fuzzy characteristics in statistic adjudging and decision-making, a method to handle intuitionistic fuzzy sets
is proposed in this paper. Firstly, the conception of intuitionistic fuzzy events probability is given. Then the conceptions
of intuitionistic fuzzy ??-norm and ??-norm are proposed, the characteristics of intuitionistic fuzzy events probability are
detailed and testified, and the theorems of multiplication, absolute probability and Bayes are described and proofed. Based
on the characteristics of intuitionistic fuzzy events probability and different types of information source, the techniques of
intuitionistic fuzzy statistic adjudging and decision-making are particularly analyzed. Finally, experiments on a problem of
investment show the effectiveness of the algorithms.