This project presents a performance study of an automatic bottle filling and capping machine designed to improve efficiency in liquid packaging industries. In many industries, bottle filling is done manually, which requires more manpower and may lead to errors in filling quantity. The proposed system uses a flow sensor to measure and control the quantity of liquid during the filling process. It is capable of handling bottles of different capacities and ensures accurate filling according to the required level. After the filling process, the bottle is automatically moved to the capping section where the cap is properly closed. The performance of the system is evaluated based on parameters such as filling accuracy, time taken for filling, and overall efficiency. This automated system helps reduce human effort, minimize errors, and improve productivity in bottle packaging operations. The system is designed using pneumatic components such as double acting cylinders, solenoid valves, and an FRL unit to ensure smooth and reliable operation. The use of compressed air provides faster response and consistent movement during bottle positioning and capping. The integration of a conveyor system allows continuous movement of bottles between different stages, thereby reducing idle time and increasing production rate. The control system, either timer-based or PLC-based, coordinates all operations in a sequential manner to achieve proper synchronization. The inclusion of a liquid flow sensor further enhances the performance of the system by providing real-time measurement of the liquid being filled. This ensures uniform filling for all bottles and reduces variations in quantity. The system is tested under different operating conditions, and the results show that it maintains stable performance with satisfactory accuracy.