Abstract: When a machine body 3 of a machining center 2 is being used to machine a component based on CAM data, an in-process information processing module 1a transfers to a host computer 5 in-process information of the component which is obtained by integrally processing detection data output from a temperature sensor, a vibration sensor, etc. provided to the machine body 3, to cause the in-process information of the component to be displayed on a display of the host computer 5 in such a manner that the in-process information can be compared to CAD data. In such a manner, a person in charge of the machining center can obtain improvement information in a machining process of the component based on comparison between the in-process information and the CAD data, to thereby improve an efficiency of an experimental-production process, thus reducing a development period of a product.