An installing method of an optical fiber communication conversion device is provided. The installing method includes the following steps. Firstly, a housing is provided. An opto-electronic converting module with a first cable winding structure is selectively accommodated and installed within the housing. An optical fiber wiring process is performed. If the opto-electronic converting module is provided and installed within the housing, an optical fiber cable managing function is implemented by the first cable winding structure. If the opto-electronic converting module is not installed within the housing, the optical fiber cable managing function is implemented by a second cable winding structure within the housing. The optical fiber communication conversion device using the installing method is also provided.