Abstract:In the Outline Development Plan for the Guangdong-Hong Kong-Macao Greater Bay Area, it is pointed out that the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) should "develop a vibrant and internationally competitive first-class bay area and world-class city cluster, and build a role model of high-quality development." This study compares the industrial development of GBA and three other world-class bay areas. It is found that GBA possesses the fundamental conditions for developing into an international first-class bay area in total scale, but the equality of economic growth is not high. Regionalization and industrialization are the main characteristics of the area, and the high-end service industry has huge development space. The industrial segmentation pattern between Hong Kong, Macao and nine cities of Guangdong is serious, and the cooperation potential is great. Therefore, the industrial isomorphism between nine cities of Guangdong Province needs to be further coordinated and solved. In the future, it is necessary to further promote regional coordinated development and enhance the international competitiveness and influence of the bay area through expanding opening-up.