This study aims to introduce Generative AI into vocational subject classes by developing teaching-learning materials that satisfy the achievement standards of ‘Exploration and Design of Career and Job’ learning element in ‘Successful Career Life’ subject, which is a specialized common subject presented in 2022 Revised National Curriculum for vocational high schools. The ADDIE model was applied to develop the materials. In the analysis phase, a literature review was conducted to identify the instructional needs for utilizing Generative AI in the ‘Successful Career Life’ subject of vocational high schools. Based on these findings, instructional goals were derived, and relevant tasks were analyzed to fulfill the achievement standards of the ‘Exploration and Design of Career and Job’ learning element. In the design phase, specific learning objectives were formulated, and evaluation plans for academic achievement were established. To enhance learner motivation, instructional strategies based on the ARCS model were constructed. ChatGPT, Gamma, and Canva were selected as teaching-learning tools. In the development phase, a total of six instructional materials, including a lesson plan for the ‘Exploration and Design of Career and Job’ learning element, were developed. The validity of these materials for field application was verified by experts, followed by a pilot test. Ultimately, materials for seven class sessions were completed. Afterwards, a pilot test was conducted and teaching-learning materials for a total of 7 classes were completed. In the implementation phase, the developed teaching-learning materials were applied in a class for 16 students at J Meister High School in Jeonbuk province. In the evaluation phase, the degree of learners’ achievement regarding the ‘Exploration and Design of Career and Job’ standards was assessed using a developed rubric, and learner satisfaction was surveyed. The average score for learners’ achievement based on the rubric was 14 out of 15. Through the above efforts, it is expected to provide opportunities to use new AI tools such as Generative AI in vocational high school classes, and also to expand the scope of related literacy cultivation and vocational education.