Background: With the continuous expansion of urban scale and the increasing concentration of population, public health crisis has become an important part of urban residents' health management. The outbreak of the COVID-19 pandemic in Wuhan in 2020 has sounded the alarm.
Objective: With the government at all levels to carry out the construction of urban Internet of things and information internet, the Internet backbone network has been built, deployed a large number of sensors, and collected a large number of urban situation data.
Methods: In this paper, situational awareness technology is introduced into public health emergency services.
Results: By constructing ontology, situational data and residents' health data are integrated. Through key technologies such as situational data collection, data fusion and data mining, real-time perception of environmental conditions of public health emergency scene is realized, and situational data fusion and situational information reasoning model are constructed.
Conclusions: The model is applied to the public health crisis emergency simulation system to verify the effectiveness of the model.
Keywords: Situational awareness; ontology technology; public health emergency.