The present invention relates to a Hanwoo breeding cycle management system, and more specifically, as a Hanwoo breeding cycle management system capable of forcibly enforcing Hanwoo management through a registration procedure, comprising: an estrus detection unit that detects whether or not an individual is in heat； A server that receives estrus information from the estrus detection unit, manages and stores information on reproductive cycles and reproductive states for each individual； And a breeder terminal receiving information on breeding for each individual from the estrus detection unit and the server, or transmitting information on breeding for each individual to the server, wherein the server detects estrus of the individual from the estrus detection unit A schedule calculation unit for receiving the estrus information and calculating the breeding cycle； A registration unit for receiving and registering the actually confirmed breeding status from the breeder's terminal； And a comparison unit for comparing the difference between the expected breeding state according to the breeding cycle calculated by the schedule calculation unit and the actual breeding state registered in the registration unit for each individual. According to the Korean cattle breeding cycle management system that can force the management of Korean cattle through the registration procedure proposed in the present invention, based on the movement and behavior information of the cattle detected by sensors attached to each Korean cattle individual, the behavior pattern of cattle is determined and By including an estrus detection unit that detects the presence of estrus, it is possible to more accurately and easily determine the estrus period of cattle, and prevent the occurrence of aggression period and reproductive disorders (low conception, weak estrus, no estrus, early mortality), and breeding of cattle. It increases efficiency, reduces damage due to estrus undetected, and ultimately contrib
