The main idea of this work is to design and realize a fuzzy controller to stabilize an inverse pendulum pneumatically actuated. This system is widely used and studied in academic and industrial applications. The fuzzy logic introduces a new design method in this classical system. The system needs a double control, the position of the cart and the angle of the pendulum. This problem has been resolved by using two nested feedback control loop. All the design has been done using the model-based approach. The challenge of this work is to use a very low-cost controller, an Arduino board, to stabilize an inverted pendulum mechanically connected to a pneumatic actuator, so also the system is a low-cost application.