According to research surveys, the patients with type 2 diabetes often lack safety protective equipment for the removal of insulin syringe needles in their home. Approximately 70 % of the patients and their families using an insulin pen have been pricked by its needle. The needle-stick not only potentially causes hepatitis, human immunodeficiency virus (HIV), and fatal diseases, but also affects psychological health. The method in this study includes the use of stereolithography (SLA) 3D printing technology for innovative research and development of an insulin-pen- needle-remover. This insulin-pen-needle can be safely removed from the remover and directly discarded into the disposal bin without recapping with both hands, so that the safety of patients/their families can be ensured, the risk of needle-stick infection reduced, and the quality of health care for the patients with diabetes improved. Therefore, with the appearance of 3D printing technology, this study was aimed to explore the innovations applicable to medical care and rehabilitation.