Abstract-The aim of this research was to develop the learning process of Scientific Imagineering through Augmented Reality (AR) in order to enhance STEM literacy. The research methodology was divided into two phases: 1) the documents in the Imagineering process, the Scientific process, and the AR learning environment were synthesised to develop the learning process of Scientific Imagineering through AR to enhance STEM literacy; 2) the suitability of the learning process of Scientific Imagineering through AR in order to enhance STEM literacy was evaluated by 10 experts who hold doctoral degrees, work as university lecturers and have at least 10 years' experience. The experts consisted of four experts in STEM disciplinary subjects, three experts in science education and three experts in technological education. The results showed that the learning process of Scientific Imagineering through AR to enhance STEM literacy consisted of the learning process of Scientific Imagineering and the AR learning environment. The learning process of Scientific Imagineering consisted of the six following steps: 1) imagine; 2) study and research; 3) design; 4) develop; 5) present; and 6) evaluate. The AR learning environment consists of six factors: 1) flexibility; 2) user's reaction; 3) educational efficiency enhancement; 4) learning convenience; 5) motivation building and 6) collaborative learning encouragement. According to the evaluation from the experts, it was shown that the experts strongly agreed on the developed learning process of Scientific Imagineering, the AR learning environment, and the learning process of Scientific Imagineering through AR can develop STEM literacy.