The former Bank of Thailand Northeastern region office, built in the modern age, is in the Khonkaen city center which is surrounded by the school, market, community area, and residential area.  The building has its unique characteristic with a waffle slab roof and cantilever floor the grid modular is obviously shown in this building. The existing consist of an office building, staff residence, and demolished banknote department. After The Bank had been moved to the new place, this building is intended to transform its function to serve people in the city. The renovation intends to turn to be The Treasury Museum Khonkaen which consists of a museum building, gallery space, multi-purpose pavilion, public park, and office that can support many activities for people. The design keeps the unique character of the modern era while adjusting some elements to make it match the new function.