A prefabricated building system is strongly recommended for military facilities in order to take efficiency on military rearrangement plan based on prospective change in operation environment. Modular architecture not only has typical benefits of prefabricated building such as shorter build time and budget reduction, but also can get mobility, reusability and proved quality via mass production. This study present improvement plan about modular architecture(BOQ : Bachelor Official Quarter) which contains reference from former modular architecture case study and technical data analysis, and satisfies military functional demand. According to modular applicable facility judgement from analyzation considering legislation, military demand and construction system, design guidelines are like followings - Basic specifications of modular lodge for single officer is $(W)3,300mm{ imes}(L)5,700mm{ imes}(H)3,200mm$ - Modular unit contains each walls and ceiling, and its factory manufacture rate should over 80% (include equipments) - Advanced equipment and foundation work without PIT for better mobility and reusability. - Absorbing material and thermal insulating material should be constructed. - Integrated order for efficiency when modular produced by factory manufacturing. In conclusion, this study present basic plan for effective apply of modular architecture in the military.