The giant woman, Seolmundae Halmang, is the god who made Halla mountain and parasitic volcanoes. If a person is involved in forming the ground, the person is regarded as god. But the character of Seolmundae Halmang of jejudo as god is not clear. Generally, Seolmundae Halmang is a leading character of legend. But one time, she was a leading character of myth. It is because Saemyungju (who is a character of Songdangbonpuri which is a myth) and Seolmundae Halmang are recognized to be same character. That is, before the written word age, Seolmundae Halmang story had been handed down as myth. As time goes by, it was transformed to legend. Now, Seolmundae Harbang appears in Seolmundae Halmang story, and recreational contents are also added to Seolmundae Halmang story. For this reason, Seolmundae Halmang story has also the character of folktale. People`s thought about natural objects is reflected on folktale. So, in this writing, I tried to interpret the character of god which Seolmundae Halmang has from the death motif of Seolmundae Halmang and the motif of Seolmundae Halmang`s having given birth to Obaekjanggun. According to my interpretation, jejudo`s residents had the thought that land floats. So Seolmundae Halmang had to be drowned to death though she was tall. Obaekjanggun folktale and Seolmundae Halmang folktale are two different things. Obaekjanggun folktale has been handed down owing to Imjae`s having added legend of china to Youngsil fantastic rocks. There was a Buddhist temple which was called “Jonjaam” in korea era. So, now, at private sector, Obaekjanggun folktale is being handed down as “Obaekjanggun”, while, it is being handed down as “Obaeknahan” by Buddhists. Some of researchers transformed plots of Seolmundae Halmang story and Obaekjanggun story to draw the interest of readers. So, today, the early shape of stories disappeared, and only interesting contents are being handed down.