Although Guui-dong fortress consider as a Baekje tumulus, It reperceive as a Goguryeo military facility during the process of organizing relics that excavated from Mongchontoseong Fortress. In this writing, after recognizing synchronism of a pit dwelling and excavated relics in Guui-dong fortress, we looked at the landscape and characteristics of the fortress during the period of the fortress, focusing on the loading method. As a result, it was revealed that the fortress in Guui-dong was divided into threee periods. The remains belonging to the first stage are drainage channels and earth mines. However, the remains of this period were damaged because of transfusion residence was installed. Therefore, the exact aspect is unknown. Rampart of first stage was stacked up by large size of chipping, a spur -chiwas not installed. It is difficult to grasp the exact structure of the fortress, however considering the size of the fortress and the installation of drainage channels inside, it is difficult to say that a large number of people resided. State of second stage changed extremely. Projection added in rampart and digged structures installed inside. Inside the residence, an area of up to seven troops will be secured. Considering the organization of Goguryeo army, it is believed that about five people were stationed. However, the number of weapons or household containers used by the garrison is unknown. In addition, it is clear that the importance of the fortress has increased or was actively used as the ruins, earthworks, and stone pillars were installed in the south of the portress. The standard for distinguishing between the second and third stages is whether excavated artifacts can be loaded inside the residence, and if the structures functioned inside the residence, the excavated relics cannot be loaded, indicating that they were expanded to their appearnace at the time of the investigation. Furthermore, unlike the previous period, it suggests that the characteristics changed to special facilitiessuch as warehouses and were discarded in that state. Since troops could not reside inside the warehouse during this period, it is considered that the management would have alternately worked with the troops residing in the 2st bastion of Guui-dong or the troops from the surrounding bastion. The fortress in Guui-dong was built as a the secretaria relic, but its character changed to a warehouse, and as it was discarded in that state, a large amount of relics were excavated from inside the remains, unlike other dwellings. This aspect can be applied to Goguryeo and South Korea fortresses in Achasan Mountain and also other region both. Therefore, if the fortresses in Guui-dong and Goguryeo fortresses in Achasan Mountain are reexamined, Goguryeo’s rule over the Hangang River basin from 475 to 551 years will be restored in three dimensions.