This paper proposes an intuitionistic fuzzy optimization approach to solve a multi-objective nonlinear programming problem in the context of a reliability application. We have considered a multi-objective reliability optimization problem with reliability and cost as objective functions. Intuitionistic fuzzy optimization approach is used to solve this multi-objective reliability optimization model. It is shown that the proposed intuitionistic fuzzy optimization approach is more efficient than the analogous fuzzy technique. Numerical examples are provided to illustrate our approach.