Abstract: This paper presents simulations of two process control systems using fuzzy Logic Controller. The aim of this paper is to create a convenient adaptable simulation systems that can model particular control systems and obtain solutions by applications of the fuzzy logic technology. The performance of the process control systems with fuzzy logic controller is compared with that of the conventional proportional Integral and Derivative (PID) controller. This fuzzy logic based process control system needs design of the appropriate rule base. It is shown that the response of the system with fuzzy logic controller (FLC) is better in comparison with the system performance using the conventional PID control method.