In Taiwan, the administrative interpretations on Article 11 of the Physician Act define physician's duty of diagnosing in person that a physician must diagnose patients at presence (face to face). This may bar the implementation of telehealth from involving practice of medicine, prescribing medicine online as well. And the substantial function of telehealth for providing medical services would be restricted. In view of this, this article primarily introduce the experience of the United States and Japan on promulgation of new regulations, revision of existing laws, and administrative interpretation to adapt legal environment to the development of telehealth. Then, it also compare the unsolved problems about related medical regulations in Taiwan to other countries mentioned above. Finally, several suggestions are tried to propose to promote further application of telehealth in Taiwan.