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A real-time environment information acquisition system is essential if models and vegetable-crop information are to be integrated with a greenhouse management expert system for good decision making. Our greenhouse management expert system has four functional modules: (1) cultivation techniques, (2) pest and disease diagnosis and prevention, (3) nutrient deficiency diagnosis and fertilisation, and (4) environment control. The hardware and software of the environment information acquisition system are incorporated into the expert system, which also offers a multi-interface for sensors and is easily extended and maintained. Implementation was accomplished with the whole system to ensure its reliability and applicability for expert system, on-line decision making. The results show that a dynamic integration of a greenhouse management system and an environment information acquisition system can supply sufficient information for good control strategies and for decision-support. [ABSTRACT FROM AUTHOR]