Abstract: The copper coin bureau established in 1905, is the pioneer modern machine shop in Chongqing. Originally it only produced copper coin and silver coin, then it was used to produce bullets by some warlords. Whose mill buildings are the largest industrial construction colony, which are still used at the present. They have been preserved most integrally, and are similar to some typical workshops in westernization Movement period. They are very important to modern architecture history in Chongqing. Some utilizing and preserving imaginations are proposed.