Abstract: This study investigated the influence of magnetic field energy on surface tension, viscosity, flow velocity and hydraulic pressure of grout materials by using an electro-magnetic force generator. The various changes were measured using a specially manufactured magnetic field energy force device and a transfer device. The surface tension of distilled water after treated with magnetic field energy was found to decrease after about 1 h. As a result, the reaction area of the cement paste increased, hydration reaction was promoted and the viscosity and surface tension values decreased through the generation of surplus water molecules. To confirm that the magnetic field energy caused the flow efficiency to increase and hydraulic pressure to decrease due to the decrease in surface tension and viscosity, the grout material in the pipe was circulated and the hydraulic pressure was measured. The data confirmed that the hydraulic pressure decreased after applying the magnetic field energy. Furthermore, it was verified that the fluidity of the grout material improved due to the magnetic field energy.