Abstract: The traditional culture method mainly relies on the experience of the fish pond farmers to judge the environmental conditions of the fish pond. Sometimes, due to environmental changes, experience deviations and other reasons, it will cause misjudgments or untimely reactions, resulting in a large number of fish fry dying, and finally causing economic losses to the fish pond farmers. This paper developed a solar energy fish pond automatic control system. Based on STM32 single chip microcomputer, the water quality indicators of the fish pond are detected by various sensors, which are sent back to the mobile phone app through the wireless module, and can be viewed anytime and anywhere. At the same time, oxygenation, feeding and dosing can be realized through remote control, so as to realize the automation and science of fish pond culture.