Rules acquisition is one of the difficult problems the intuitionistic fuzzy inference system encounters. For the problem of rules extraction in intuitionistic fuzzy environment, the definition of the intuitionistic fuzzy system is given at first, and the decision attributes and the condition attributes as well as the intuitionistic fuzzy logic relation implicated among the linguistic values corresponding to condition attributes are analysed as well, and the logic relation of information system is constructed in this account. Furthermore, by integrating the information with decision rules expressed by the data lines having same decision value in information system, the calculation method in raged to the reliability of intuitionistic fuzzy rules including confidence and non-confidence degrees is provided, and the rule screening method based on intuitionistic fuzzy reliability is also discussed in two situations. Based on that, the rule extraction algorithm of intuitionistic fuzzy information system is put forward. Finally, through specific numerical example the usability and validity of the algorithm are verified
