Apart from drug control, diabetes management should pay more attention to how lifestyle and daily routine affect blood sugar. This study aimed to explore the impact of m-health programme using a minimal psychological intervention on diabetes patients' knowledge, behavioural, and psychological health. A pretest-posttest single-group pre-experimental study was undertaken with 30 individuals to recruit patients with diabetes. A total of 22 participants completed the 10-week online programme. The pretest-posttest results demonstrated the differences in health behaviour, including foot care, diet control, and exercise. The adoption of m-health that changed and improved patient's self-care; however, the acceptance of using m-health remains a challenge for public dissemination.