Guangzhou is among the few cities which took initiatives to establish the urban Minimum Living Standard Guarantee System（MLSGS）in China. After the development of more than ten years，Guangzhou has consolidated its social safety network for its residents. Such a network has played a great role in alleviating poverty，promote economic growth and enhance social justice. This article aims to make a comprehensive analysis of the development of the urban MLSGS in Guangzhou. It first outlines the development track of the urban MLSGS，and then examines its features. The core section focuses on the effectiveness and weakness of the MLSGS in Guangzhou. It argues that although Guangzhou has developed a relatively mature MLSGS，its benefit level is still relatively low.