With its unique advantages, computers are applied to various fields, and the garment industry is no exception. The study explores the role of computer-aided design technology in the apparel industry from the perspective of apparel design, production, and sales. We aim to evaluate the effect of computer technology on clothing design and production by constructing a clothing style migration model based on CycleGAN and evaluating its image style migration effect and aesthetic quality. Then, after completing the research design, we analyze the effect of virtual fitting rooms on consumers’ purchase intentions so as to support the role of computer technology in clothing sales. According to the findings, the clothing style migration model’s generated images are of excellent quality, with an average evaluation score of 6.68, and are acknowledged by nearly 80% of the respondents. All four characteristic elements of the virtual fitting room positively and significantly affect consumers’ purchase intention at the level of 0.01, and perceived risk and perceived value play a mediating role, which explains the process of generating consumers’ apparel purchase intention based on the virtual fitting room. Computer-aided design technology can be utilized effectively in apparel design to boost apparel sales and foster the transformation and advancement of the apparel industry.