In cylindrical plunge grinding, thermal deformation of a workpiece adversely affects the dimensional accuracy. Therefore it is very important to consider the thermal deformation during grinding process. We developed a new machining system to predict the stock removal of workpice after the ground workpiece is cooled down. In this system, the thermal deformation is estimated and added to the gauged stock removal of workpiece and the real stock removal after cooling is predicted during grinding. Grinding experiments were carried out to verify the dimensional accuracy predicted with the system.