In traditional horticultural work, there is a high level of manpower input and labor intensity, which can lead to human errors. Therefore, this article used automatic horticultural equipment based on digital processing technology to achieve real-time monitoring of plants, perform reasonable operations, and provide suitable environmental conditions for them, improving their yield and quality. Firstly, the system and computer programs of automatic gardening equipment were designed; program requirements were analyzed, and software architecture, interfaces, and modules were designed. Secondly, based on data processing technology, data collection was carried out to achieve monitoring and control of planting environment, as well as automated horticultural operations, and data analysis and decision support were completed. Finally, experimental analysis was conducted on the designed automatic gardening equipment. The experimental results showed that the response speed, data transmission speed, and work efficiency of automatic horticultural equipment based on data processing technology were all optimal, and the performance was far superior to traditional horticultural equipment. This further demonstrates that automatic horticultural equipment and computer programs based on data processing technology can provide intelligent plant growth management and monitoring.