The invention provides a multifunctional stratum structure model test system and test method, and the system comprises a test piece test device platform which consists of a watertight fan-shaped closed cavity, a fluid-solid coupling loading system, a reverse arc-shaped reaction frame and other systems; the coupling loading system area comprises water pressure (liquid) loading and multi-directionaltest piece skeleton loading which are carried out on the pore crack test piece and can be independent of each other or combined with each other; the fan-shaped closed cavity is fixed through a reaction frame system, an underground working face construction area is arranged in the circle center area of the fan shape, and physicochemical improvement construction areas for surrounding rock can be arranged on the other two flat side faces of the fan shape. The test piece processing platform is based on future 3D printing development, the manufacturing template is made of inorganic materials suchas tempered glass consistent with the test piece in performance and can be disengaged or not disengaged, and the outer surface of the test piece is smooth and meets the sealing requirement. The test method is synchronous with a numerical model, and various lines of various complex underground engineering model tests and related theoretical researches are carried out according to a full-scale and strict scientific policy.