Many properties of Hwaseong were restored in 1970s. The existence of Hwaseong songyouk eugye has enabled restoration of Hwaseong in the short period of time. In addition, Hwaseong was enlisted on World Heritage by recognition of its authenticity. We have been making repairs constantly until it was restored 40 years ago and we dismantled and repaired Paldalmun lately. This year we decided to dismantle and repair Dongnamgagru of Hwaseong due to its leaning. I on this occasion studied on the original form of Dongnamgagru of Hwaseong and thereby I figured out the use of it and identified the differences from its present status by analyzing and synthesizing the contents of Eugye.