The present invention relates to a multifunctional attachable agricultural machine automated operating system wherein, various attachable agricultural machines, such as an agricultural chemical sprayer, a seeding machine, a harvester, and a farmland working machine (excavator, ridger, rotary machine, etc.), are coupled to the main unit thereof and are moved along a guide rail, thereby automating the agricultural work. More particularly, the present invention relates to a multifunctional attachable agricultural machine automated operating system, which is compact and lightweight and thus is suitably used on a farm field, such as a facility greenhouse, and which can conveniently replace various kinds of agricultural machines, thereby automating the agricultural work according to the season. A multifunctional attachable agricultural machine automated operating system according to the present invention comprises: a guide rail installed in the longitudinal direction of a farm field; a main unit configured to move along the guide rail; an agricultural machine for conducting an agricultural work on the farm field using power from the main unit; and a fastening unit for releasably fastening the agricultural machine to the main unit.La présente invention concerne un système d'exploitation multifonctionnel automatisé de machine agricole pouvant être fixée, différentes machines agricoles pouvant être fixées, telles qu'un pulvérisateur agricole de produits chimiques, un semoir, une moissonneuse, et une machine de travail de la terre agricole (excavatrice, butteuse, machine rotative, etc.), étant couplées à son unité principale et déplacées le long d'un rail de guidage, permettant ainsi d'automatiser le travail agricole. Plus particulièrement, la présente invention concerne un système d'exploitation multifonctionnel automatisé de machine agricole pouvant être fixée, qui est compact et léger et qui, de ce fait, est utilisé de façon appropriée sur un champ agricole, tel qu'une ser