The paper proposes the transfer technique of haptic information under the narrow-band network. The bilateral controller through the low-rate network encounters the influence. In this paper, the compressors and the decompressors is implemented to the bilateral controller based on a motion copying system in order to solve the problems. The data compressors reduce an amount of the data, which flows between a master system and a slave system in the bilateral controller. The reaction force between the master and the slave becomes stable even if the data transfer rate is low in the network. The paper confirms that the bilateral controller using the compressors and the decompressors normally operates. The viability of the proposed method is confirmed by experiments.