Abstract: Provided are a method and an apparatus for generating image data for machine learning. The method may include extracting first image data for a product generated as a result of conducting a first step among a plurality of steps of a manufacturing process of a product based on 3D CAD data for the product, generating a plurality of posture conversion image sets corresponding to a plurality of postures for the product, respectively, based on the first image data, performing image processing through a rendering engine by applying actual image data to respective images of the plurality of posture conversion image sets, and generating a learning data set for the first image data through the image processing.