A device for obtaining C.G.S injection control chart for seismic retrofitting and controlling quality includes a pump unit which injects a grout into the ground in predetermined quantities per unit time at an injection pressure that is a predetermined static pressure; a sensor unit which measures a discharge pressure which is a pressure at which the grout injected into the ground through the pump unit is discharged from the pump unit; and a monitoring unit which calculates injection control charts for each depth on the basis of injection quantities per unit time of the grout being supplied by the pump unit, and the discharge pressure measured by the sensor unit.