In this study, the result of measurements a geogrid-reinforced slope and the simulation result using the finite element analysis program Visual FEA/Edu were compared for verifying the validity of the finite element analysis model that was used. A reinforced slope was formed as a finite element mesh and the soil and geogrids physical properties were assigned. The actual settlement of the reinforced slope and finite element analysis results from the contour image showed similar aspects. When the finite element mesh was correctly formed and the exact physical properties of the target were assigned, it was supposed that the results of analysis were reliable. By simulating the field condition before construction, we can dtermine what kind of geosynthetics are reasonable for designing and installation in the field.