Based on principle of fact-based and data-driven，this report studies the medical development status and overall level of Guangdong-Hong Kong-Macao Greater Bay Area urban agglomeration from five aspects of regional distribution，competitive factors，resource allocation，hospital nature，and medical service radius. Meanwhile，this report analyzes the top 100 hospitals in the Guangdong-Hong Kong-Macao Greater Bay Area in 2020. The study found that the urban agglomeration of the Guangdong-Hong Kong-Macao Greater Bay Area not only has a superior geographical location，outstanding economic strength，rich medical resources，strong overall hospital competitiveness and high-quality hospital operation and service capabilities. All these are important foundations to support the sustainable development of Guangdong-Hong Kong-Macao Greater Bay Area.