A yarn processing facility comprising: a yarn processor including: a yarn supplying unit capable of supplying at least one yarn; a processing unit configured to process the at least one yarn supplied from the yarn supplying unit; and a winding unit configured to form a wound package (Pw) by winding the at least one yarn processed by the processing unit onto a winding bobbin (Bw); and an information management unit configured to manage information regarding the yarn processor, the yarn supplying unit including at least one yarn supply package retaining portion to and from which yarn supply packages (Ps) each including a yarn are attachable and detachable, the at least one yarn supply package retaining portion being able to uninterruptedly supply at least one yarn when a terminal portion of a yarn in one yarn supply package (PsA) among the yarn supply packages (Ps) is connected to a start end portion of a yarn in another yarn supply package (PsB) among the yarn supply packages (Ps) from which the yarn is to be unwound next to the one yarn supply package (PsA), when a yarn is unwound from one of the yarn supply packages (Ps), the information management unit acquiring, at a given reference time point and by means of a calculation, at least one of (i) remaining amount information regarding a remaining amount of the yarn in the one of the yarn supply packages (Ps) and (ii) remaining time information regarding a remaining time in which the yarn can be supplied from the one of the yarn supply packages (Ps) at the reference time point, characterized in that when sudden replacement information indicating execution of sudden replacement in which unwinding of a yarn from one of the yarn supply packages (Ps) has started and has not ended yet and the one of the yarn supply packages (Ps) is replaced with new one of the yarn supply packages (Ps) is acquired, the information management unit performing a reset process of resetting the at least one of the remaining amount information and the remaining time information to a predetermined initial value. a yarn processor including: a yarn supplying unit capable of supplying at least one yarn; a processing unit configured to process the at least one yarn supplied from the yarn supplying unit; and a winding unit configured to form a wound package (Pw) by winding the at least one yarn processed by the processing unit onto a winding bobbin (Bw); and an information management unit configured to manage information regarding the yarn processor, the yarn supplying unit including at least one yarn supply package retaining portion to and from which yarn supply packages (Ps) each including a yarn are attachable and detachable, the at least one yarn supply package retaining portion being able to uninterruptedly supply at least one yarn when a terminal portion of a yarn in one yarn supply package (PsA) among the yarn supply packages (Ps) is connected to a start end portion of a yarn in another yarn supply package (PsB) among the yarn supply packages (Ps) from which the yarn is to be unwound next to the one yarn supply package (PsA), when a yarn is unwound from one of the yarn supply packages (Ps), the information management unit acquiring, at a given reference time point and by means of a calculation, at least one of (i) remaining amount information regarding a remaining amount of the yarn in the one of the yarn supply packages (Ps) and (ii) remaining time information regarding a remaining time in which the yarn can be supplied from the one of the yarn supply packages (Ps) at the reference time point, characterized in that when sudden replacement information indicating execution of sudden replacement in which unwinding of a yarn from one of the yarn supply packages (Ps) has started and has not ended yet and the one of the yarn supply packages (Ps) is replaced with new one of the yarn supply packages (Ps) is acquired, the information management unit performing a reset process of resetting the at least one of the remaining amount information and the remaining time information to a predetermined initial value.