The aim of this study is to find fuzzy reliability of single-input–single-output wind turbine. Fuzzy reliability is the combination of the fuzzy set theory (FST) and reliability. Intuitionistic fuzzy set theory is used to evaluate fuzzy system reliability, and the reliability function was formed by path tracing method. Triangular intuitionistic fuzzy numbers and triangular dual hesitant fuzzy numbers are used to consider the reliability of each subsystem with membership and non-membership functions. It concludes that these fuzzy set extensions handle uncertain and imprecise conditions which are difficult to manage by traditional methods.