COVID-19 epidemic has not only affected people’s production and lifestyle, social economy, and the
healthy development of cities, but also reflected the serious urban diseases that breed in the process of metropolis
expansion, and brought severe challenges and tests to the environment. Based on the data from the National
Bureau of Statistics, recent remote sensing images, and indoor and outdoor experimental data, this paper uses
Analytic Hierarchy Process AHP and Nemerow Index to construct a comprehensive evaluation system for the development of a healthy environment in metropolises in the post-epidemic era. Then this paper puts forward
the treatment measures to deal with the problem of urban disease. The results of the research are as follows:
(1) The quantitative evaluation model of healthy environment model is constructed according to the grey
statistics method and AHP; (2) Nemerow index is used to judge that environmental quality and medical and
health environment are the main decision-making indicators that affect the urban health environment, and the
order is ranked according to the size of environmental factor index; (3) Taking the urban disease problem in the
urbanization process of Wuhan before the COVID-19 epidemic as an example, the feasibility of constructing a
healthy environment model was verified, and Suestions for governance and decision-making were put forward
based on the ranking of environmental factors index, so as to provide reference for dealing with similar major
outbreaks in the process of urbanization in the post-epidemic era.