The researchers conducted in-depth interviews with 14 Taiwanese stakeholders, using semi-structured questionnaires, either face-to-face or over the telephone, in 2016-2017, to better understand stakeholders' perspectives. All interviews were transcribed. In addition, a cross-sectional, on-line, self-administered, and anonymous survey was conducted between July and November 2017 to collect the behavioral and socio-demographic characteristics of e-cigarette users, and to assess the public's opinions on e-cigarette regulation and policy options. Almost all interviewees agreed that there is a need for a specific legal framework for e-cigarettes in Taiwan, and that e-cigarettes should be regulated in the same way as combustible cigarettes. We documented the attitudes of a self-selected sample of the general public in Taiwan regarding e-cigarette regulations and policies. These results may be useful to design studies in more representative samples and to inform e-cigarette regulations, policies and education campaigns.