Abstract: The words of “Intelligent Agriculture(IA)” described basing on feedback control theory is attractive concept1. With the concept, the agriculture field can be designed one close large system, and all of intelligent technologies combination artificial intelligent(AI),automation and operational research can be used in, and whole agriculture system can be realized to intelligentize with advanced detecting technology and network technology etc. According to the meaning of IA, that dissertating and development of IA is belong to complexity system control scale. In this paper, the describing for IA is discussed and consummated, and some questions about IA system, such as the application of AI and automation, complexity large system analysis and modeling, system control goals etc. are analysed. By the way, some research objects and serious problems in IA are presented in this paper too.