A component management system, comprising: a component management database for managing a plurality of components constituting a structural body, wherein the component includes a wooden material, the component management database being configured to: store, for each of the plurality of components, a component ID of the component, a pre-processing shape data of the component, a post-processing shape data of the component, a processed shape data being a difference between the pre-processing shape data and the post-processing shape data, a component ID of a second component to be connected to the component, and a connection category ID representing a connection type of a connection part between the component and the second component, in association with one another; and store a model shape of the connection part by the connection type; a CAM device capable of sending and receiving data with the component management database, the CAM device being capable of generating a tool path of the component on the basis of the processed shape data; a processing device capable of processing the component using a processing tool on the basis of the tool path generated by the CAM device; an identification mark appended to the component, the identification mark including an encoded information containing an information which specifies the component and an information of a shape model of the component; and an information terminal which includes a capturing device that captures an image, a reading device capable of extracting the identification mark from the captured image captured by the capturing device and reading out information encoded in the identification mark, and a display device displaying the captured image and displaying the shape model of the component from information encoded in the identification mark read out by the reading device such that the shape model overlaps with the captured image, wherein the identification mark includes encoded information of the shape models (193A, 194A) of the components (193, 194) to be connected to the component appended with the identification mark, and the display device is configured to display the shape models (193A, 194A) with the shape model. a component management database for managing a plurality of components constituting a structural body, wherein the component includes a wooden material, the component management database being configured to: store, for each of the plurality of components, a component ID of the component, a pre-processing shape data of the component, a post-processing shape data of the component, a processed shape data being a difference between the pre-processing shape data and the post-processing shape data, a component ID of a second component to be connected to the component, and a connection category ID representing a connection type of a connection part between the component and the second component, in association with one another; and store a model shape of the connection part by the connection type; store, for each of the plurality of components, a component ID of the component, a pre-processing shape data of the component, a post-processing shape data of the component, a processed shape data being a difference between the pre-processing shape data and the post-processing shape data, a component ID of a second component to be connected to the component, and a connection category ID representing a connection type of a connection part between the component and the second component, in association with one another; and store a model shape of the connection part by the connection type; a CAM device capable of sending and receiving data with the component management database, the CAM device being capable of generating a tool path of the component on the basis of the processed shape data; a processing device capable of processing the component using a processing tool on the basis of the tool path generated by the CAM device; an identification mark appended to the component, the identification mark including an encoded information containing an information which specifies the component and an information of a shape model of the component; and an information terminal which includes a capturing device that captures an image, a reading device capable of extracting the identification mark from the captured image captured by the capturing device and reading out information encoded in the identification mark, and a display device displaying the captured image and displaying the shape model of the component from information encoded in the identification mark read out by the reading device such that the shape model overlaps with the captured image, wherein the identification mark includes encoded information of the shape models (193A, 194A) of the components (193, 194) to be connected to the component appended with the identification mark, and the display device is configured to display the shape models (193A, 194A) with the shape model.