A method for conserving soil and water comprises a botanical net body and a soft framework system for supporting the net body, and the net body is mainly made of straws, fabrics, and meshed materials similar to a net woven with flat and curve surfaces, combined with a frame, or directly coupled to the interior of the framework for filling soil into its hollow portion. The framework includes anchoring elements, multidirectional connecting rings and connecting elements between the rings, and the net body is connected to the framework by connecting the net body with a preassembled soft framework and anchoring the two together for filling soils and growing plants or solely anchoring the framework with the net body. After the net body is filled with soils and grown with plants, the net body is moved to the place of the framework and connected to the framework.