A tracking device and a tracking device control method with intelligent safe-zone demarcation are provided. The tracking device includes a positioning module, a long-range transceiver and a microcontroller. The microcontroller is configured to operate the long-range transceiver to regularly transmit position information of the tracking device to a server during a data-collection period for behavior analysis of a tracked object equipped with the tracking device and for safe-zone demarcation of the tracking device. The safe-zone demarcation is adaptive to habitual behaviors of the tracked object, and the habitual behaviors are obtained from the behavior analysis.