In the public health crisis situation that occurred with the onset of the 2020 novel coronavirus infection (COVID-19) pandemic, Korea is evaluated as having succeeded in initial response compared to other countries. At the time, the government's active strategy to respond to infectious diseases, called preemptive testing, tracking, and treatment(3T), attracted global attention. The success of these infectious disease response policies can be said to have played a significant role in scientific advisory. However, it is questionable whether the current scientific advisory system can effectively deal with another crisis in the future. Therefore, a review of overseas scientific advisory is required. In particular, in Japan, since various problems with the method of scientific consultation were pointed out at the time of the Great East Japan Earthquake in 2011, systematization and theorization in this regard have progressed considerably. However, it has been pointed out that Japan's scientific advisory related to Corona 19 did not function sufficiently in an emergency. Therefore, in this paper, we drew implications in Korea by examining Japan's infectious disease response system and scientific advisory at the time of COVID-19.