Abstract: This article combining with the characteristics of greenhouse crop cultivation and to develop a system for the spray.This set of equipment is mainly composed of mechanical arm and mobile platform, and also involves variable nozzle and disease diagnosis information system. During the system installation process, the platform is reasonably installed and fixed based on the elevated guide rail, at the same time, according to the specific situation of greenhouse cucumber cultivation suitable parking. It can also reasonably control and adjust the spray quantity and spray time on the premise of systematic analysis of plant diseases.