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This paper presents a tracking robot, which can chase its owner and go where the owner is. It adds a wireless beacon to the target to build a Radio Frequency (RF) wireless system. It uses correlative phase interferometry method based on wireless location of single receiving station to get the orientation of the target, and uses a sonar systemto get distance information. Then it tracks the target according to orientation and distance information. The advantages of the system are (1) tracking in short distance; (2) robustness in target loss; (3) the simple structure. The prototype was constructed and a number of experiments were carried out, demonstrating the feasibility of the system.