Moving object detection is very important in the development of smart city for Visually Impaired People (VIP). In this paper, we propose a new methodology to realize a moving object detection system from TV based on passive radar which is applied to RFID Intelligent Cane in future. Image comparison and detection methods are also applied to complete the detection system. The innovation of our detection system is about the system architecture of the 920MHz UHF RFID, 700MHz band analogue TV based passive radar, image comparison and machine learning algorithms to realize the practical moving object detection system for UHF RFID Cane.