Memory destruction affects daily life of the elderly, and dementia is an irreversible brain dysfunction. In non-pharmacological treatments of dementia, spaced retrieval training (SRT) is a memory intervention supporting memory recall and remaining memory capacity. Furthermore, it is easy to learn and execute by caregivers. Studies show interactive technology could reduce cognitive load and increase learning interest of dementia patients. However, related researches of combining interactive technology and SRT are still unclear. The conventional SRT uses typography and pictographs as training content, while employing interactive technology in SRT provides an interactive environment with an intuitive learning experience. Therefore, the objective is developing design criteria of SRT system through observation, interview, and focus group. Twelve elderly people, one social worker, and two caregivers are recruited for observation and interview to collect information for focus group. The results are utilized as design criteria for SRT system and establish foundation for future work.