Luehdorfia puziloi (Erschoff, 1872) is a monophagous butterfly species that occurs only once during spring in a year and distributed nationwide in Korea. From 2012 to 2013 the adult emergence has been monitored to assess how the species responds to temperature rise in the country. Monitoring sites were located in four different provinces, two in the northern part of the country and the others the southern part. In each site a small emergence cage was set up with 60 to 70 pupae and a HOBO data logger to record the soil temperature of the site from February to April. The earliest record from literatures and specimen collection data was 28th of March in Geojae-gun, one of far south parts of the country, during the late 90’s. In 2013, the butterfly started emerging in a southern site, Namhae-gun, from 20th of March, and it was the earliest record so far. The emergence from all of the sites occurred on average 7.75 days faster in 2013 than 2012. The emergence patters during the two years clearly showed that the adult emergence reached to 50% emergence rate faster as the soil temperature rose.