The present study was made to assess annual changes on seasonal occurrence of Apiformes, commonly known as bees, as global warming apparently happens. Bees were collected from ten sites using a malaise trap for each site, and sample collection was made every two weeks from April to September in 2011 to 2014. In overall diversity, abundance and richness of bees appeared higher in northern sites, particularly Gwangneung and Hongcheon, than southern. The abundance of bees declined sharply in 2013 and decreased even further in 2014. Among the bee families the most decreased families were Halictidae and Andrenidae. In order to see the effect of annual temperature fluctuation correlation analysis was used with collection data and weather data. However, the result indicated that the decline of the bees was not significantly affected by changes of temperature although most of the bee families except Halictidae showed negative relation with temperature data(p < 0.05). In addition we also analysed the bee collection data and flowering data during spring in Gwangneung. Dufrene-Legendre indicator species analysis (ISA) for latitudinal sites identified seventeen indicator species (p < 0.05) that were limited to northern region.