Crops such as fruit trees are highly susceptible to environmental extremes, and the protection of fruit trees and other crops is important due to the frequent occurrence of catastrophic events that cause huge economic losses to the fruit growing industry. In order to anticipate the arrival of extreme weather and bird damage, the problem of environmental monitoring in orchards has been studied and an environmental monitoring and irrigation bird repellent system has been developed. Using STM32F103 as the main control chip and multi-sensor data fusion technology, the system is equipped with a multi-parameter monitoring and control system, which is capable of real-time environmental data acquisition and display. The system also has the functions of irrigation and alarm bird repellent in case of extreme drought and bird damage. After the prototype for debugging and experiments, the results show that the system performance is good, can achieve the expected goals, with strong feasibility.