Abstract: An integrated modeling method for Illustrated Drawing (ID) authoring/modification using 3D model and Computer-Aided Design (CAD) Log database, comprising: a first step of performing a 3D Model Import process on the basis of 3D model data and logistics support data saved in each database, converting the imported 3D model file into a file which can be processed in an integrated ID environment, generating meta data from the converted file and then saving the generated meta data; a second step of importing 3D models on the basis of a request list in which Illustrated Drawing authoring is requested in a Technical Manual (TM) authoring system; a third step of adjusting movement, conversion and angle of the 3D model corresponding to a new model file in order to set up a viewing point on the basis of the 3D model if the new model file exists among the 3D models in the second step, and optimally adjusting intervals between parts of the 3D model corresponding to the new model file and automatically exploding the parts