This document summarizes an automatic bottle filling and capping system that uses a Programmable Logic Controller (PLC). The system aims to meet industrial demands by filling and capping bottles on a conveyor belt. The PLC controls the filling process and coordinates the conveyor belt and sensors. After filling, the bottles are capped. Ladder logic is used to program the PLC to control the filling and capping processes. The system is designed to efficiently and accurately fill and cap bottles for use in industries such as those packaging liquids like milk or water.