The manufacture of flexible steel plates is challenging owing to the current conveying method, wherein the contact between the rollers and steel plates deteriorates the surface quality. Hence, we propose a magnetic levitation system that supports one edge of a flexible steel plate. In the proposed system, the modeling error is large owing to the system structure and thin steel plates. Therefore, control methods that can achieve stable levitation under these conditions must be identified. The effects of the optimal regulator and servo system on the steady surfacing characteristics of a flexible steel plate are investigated. Experiments are conducted by varying only the displacement weighting matrix to investigate its effects on the levitation characteristics of the plate. The results indicate that the flexible steel plates levitated stably by applying the optimal regulator, although the levitation point fluctuated. Meanwhile, by applying the servo system, the flexible steel plate levitated stably and the levitation point is maintained.