This study is focusing on anchogongs(按草工) in yeonggeonuigwes(營建儀軌), which were recorded with few details and in unsettled transcriptions. First, the positions and functions of anchogongs in 18th censtury are analyzed by comparing to anchogongs in more detailed early 19th century yeonggeonuigwes and those in extant buildings. Second, with the result, the historical significances are presumed in changing transcriptions of anchogong terms in those uigwes. In 18th century uigwes, most of anchogongs are functioned as matbo-anchogongs and only four anchogongs in a gate building were used as jongryang-anchogongs. It is mainly because the sorts of buildings in 18th century yeonggeonuigwes had only several varieties: most of the buildings belonging royal shrines. Transcriptions of anchogong terms had been changed for reflecting functional developments of anchogongs in 18th century. However, reflections were much later than changes of actual functions.