A character-tracking system is provided. The system includes a plurality of cameras, a first computing server, a second computing server, and a third computing server. The cameras are configured to capture scene images of a scene with different shooting ranges. The first computing server performs body tracking on a body region in the scene image to generate character data. The third computation server obtains a body region block from each scene image according to the character data for facial recognition to obtain user identity. The first computing server further performs person re-identification on different body regions to link the body regions with its person tag belonging to the same user. The first computing server further represents the linked body regions and their person tags with a corresponding user identity.