Solar water pump system is an optomechanical integration system that has developed rapidly in recent years. It uses the electricity generated by solar cells to drive DC, permanent magnet, brushless, position sensorless, stator-rotor double plastic-encapsulated motors or high-efficiency asynchronous motors or high-speed switched reluctance motors to drive high-efficiency water pumps through maximum power point tracking, conversion, and control devices to bring water from deep on the surface to the ground for farmland irrigation or drinking for people and livestock. From design to manufacturing, modern technologies involving multiple disciplines such as electrical, mechanical, power electronics, computers, and control provide extremely good means for the development of modern agriculture, energy conservation, and environmental protection.