A system for locating a lost pet includes: a tag configured to be worn on the pet; a handheld device configured to be connected with the tag wirelessly; a remote server configured to store information that corresponds to the pet wearing the tag; and an application installed on the handheld device and configured to provide a user interface and establish a connection with the remote server. The tag includes wireless communication means and a unique identification code for distinguishing the tag among a plurality of tags, and is configured to broadcast the unique identification code wirelessly. The handheld device is configured to establish a connection with the tag within a predetermined range, receive the broadcasted unique identification code from the tag, and trigger a predetermined routine if the connection with the tag is terminated. A method for locating a lost pet is also provided.