It is noticeable that many East Asian governments, even those in democracies, have made significant use of digital surveillance technology to achieve better COVID-19 epidemic control. As digital surveillance is highly relevant to human rights, and there are concerns about governments taking advantage of pandemic situations to expand powers, this has led to considerable debate. For example, the governments of Japan and Taiwan have used different types of technology, such as tracking or digital footprint, and even combined them with existing communication software to investigate outbreaks and control quarantine. But not all measures have a sound legal basis and have caused much controversy. Therefore, this study would like to look at the example of Japan and Taiwan to explore: How far digital surveillance has come in the COVID-19 epidemic and how the regulation systems can catch up with it? The regulatory mechanism for the return to the new normal is also of concern in this paper.