The system under investigation is a coupled tank system of a common process in industrial control. The basic control principle of the coupled tank system is to maintain a constant level of the liquid in the tank when there are an inflow and outflow of liquid in the tank and outflow of liquid out of the tank respectively. The control of liquid level in tanks and flow between tanks is a problem in the process technologies. The process technologies require liquids to be pumped, stored in tanks, and then pumped to another tank systematically. In this work, an efficient elementary idea about the controller system and liquid level control for the tank system has been presented. The liquid level control system controls the level of the liquid whatever the disturbances, such as level change, increase/decrease of outflow and interaction between the tanks. The result shown in the project work is encouraging & promising. The main objective of this project is to determine the mathematical model of a coupled tank system using mass balance technique. It follows by designing the controllers consisting of PID and Fuzzy logic controllers for the system. At the final stage of this project, the usage of the controller in industrial applications is compared and analyzed. The reasons behind the selection of LabVIEW software among other is because of its strong graphical interface, user-friendly tools, and highly understandable approach.