A livestock management system according to the embodiment includes an RTLS tag attached to a livestock to transmit analysis information of a blood gathered from the livestock and ID information dedicated for the RTLS tag, a reader transmitting the analysis information and ID information transmitted thereto from the RTLS tag to a server and transmitting a distance value with respect to the RTLS tag to the server upon a request of the server, and the server calculating a position of the livestock having the RTLS tag based on the distance value transmitted thereto from the reader and transmitting position information of the livestock and the analysis information of the blood to a client according to the position of the livestock.
