Abstract: The transformation of China's agriculture toward the Internet of Things and intelligent technologies has emerged as an irreversible trend. With the advancement of new-type urbanization, balcony agriculture has gradually come to the fore—an increasing number of households are utilizing small spaces such as balconies for crop cultivation to fulfill the demands for a healthy and eco-friendly lifestyle. To comply with the development trend of modern agriculture and cater to the needs of fast-paced urban life, it designs an balcony agriculture intelligent monitoring system based on the OneNet cloud platform. Taking Arduino as the core controller, the system automatically collects environmental information including soil moisture and ambient light intensity of crops, enabling intelligent irrigation while supporting remote monitoring of plant growth environment parameters.