Abstract: The COVID-19 epidemic fully reflects the importance of surveillance and early warning of infectious diseases， and also puts forward higher requirements for us to further improve epidemic surveillance to achieve early detection， early identification， early reporting and early disposal of various pathogens. In this paper， we reviewed the development of the integrated surveillance system for infectious diseases in Shanghai in recent years， illustrated the approach of integrated surveillance based on syndromes and events， and initially summarized the key results of the integrated surveillance， expanding the scope of surveillance， improving sensitivity and enhancing the capacity of the system. Moreover， considering the requirements regarding the public health system， we provide some thoughts and suggestions on further expanding of the integrated surveillance， continuously strengthening the integration of public health surveillance with clinical diagnosis and treatment， laboratory capacity development， and public health information technology.