bstract: Windmills have been a symbol of sustainable energy for centuries, and their relevance continues to grow in the modern era. This abstract explores the dual functionality of windmills for both pumping and power generation. Windmills have evolved from their traditional agricultural use to become versatile renewable energy sources, capable of harnessing wind energy for various applications. For pumping, windmills are employed to lift water from wells or reservoirs, providing a reliable source of water for irrigation and domestic use, especially in remote or off-grid areas. Their mechanical design, often featuring rotating blades, efficiently converts wind energy into rotational motion, driving a pump mechanism. In the realm of power generation, windmills are pivotal in the transition to cleaner energy sources. Modern wind turbines are designed with advanced aerodynamics and materials, enabling them to capture substantial kinetic energy from the wind. This energy is then transformed into electrical power through generators. Wind farms, comprised of multiple turbines, contribute significantly to electricity grids, reducing carbon emissions and dependence on fossil fuels. This abstract underscores the dual role of windmills as sustainable solutions for pumping and power generation, emphasizing their versatility and contribution to a greener future.