In order to study durability, crack controlling of concrete structures and characteristics of concrete at early age in simulated environment, environment simulation test technology is discussed. This paper describes the successful applications of environmental simulation technique in some fields. The key techniques of environmental test of concrete structures are analyzed. The basic scheme is put forward to construct artificial climatic environmental laboratory with auto-control and multifunction. Then the layout, function and performance of the lab are determined suitably. Finally the equipment and instruments of the lab are discussed. Based on the research, environmental test of concrete durability and crack controlling will be better performed in the future.