This invention is related to the configuration and assembly method ofa boom set, which is a structure for installing attachments, i.e. clamp and bucket on agricultural vehicle. The configuration and assembly method of this boom set consist  of a stilt and pins for installing on a boom to function as a boom support with hydraulic cylinder holder and pole holder as components to maintain the part's clearance while assembling. In addition, assembly procedures of a boom set and agricultural vehicle can be done with just two users without handling costs and in a short period of time.