The VetLink, a livestock medical system, consists of several components, including a database server storing selected livestock disease information, a web service server that allows farmers to access the system through computers, and an app that allows farmers to access the system and report sick animals through mobile devices. VetLink allows (a) livestock administration officers to monitor sick animal distribution both timely and geographically, thus send out warning about potential animal disease outburst, and (b) farmers to real-time report sick livestock, receive instant potential diagnose/information, and automatically alert their vets and related personnel.