This paper attempts to evaluate Guangzhou municipal capacity to deal with public health emergencies with respect to governmental policy，rule of law，manpower-funds-material resources and technologies，and propose countermeasures for improving its capacity to deal with public health emergencies on the basis of the investigation results of Guangzhou residents’ satisfaction towards Guangzhou governmental performance in its tackling the May 21 Covid-19 Outbreak in 2021. The investigation shows，on one hand，that Guangzhou residents are generally satisfied with Guangzhou governmental efforts in the epidemic prevention and control during the outbreak，particularly its efforts in its implementation of epidemic-related policies and mechanisms，the law enforcement during the epidemic，the organization and scheduling of regular prevention and control，and digital technology control and so on. On the other hand，Guangzhou residents point out the problems that need to be addressed，i.e. the government should tighten its control in medium-and high-risk regions，strengthen its control of network information flow，improve material resource and service supports in lockdown zones，and further address the problem of the “Digital Divide” among the elderly. With regard to the problems，this study suggests that the government should make the following efforts：to improve the coordination between government employees and non-government employees to ensure smooth regular pandemic prevention work；to strengthen its control of network information flow to gain a upper hand and mobilize residents in various neighborhoods to join in the fight against the pandemic；to continue increasing the supports of manpower-funds-material resources to provide high-quality prevention materials and services；to strengthen the information sharing，and expand the scope of information technology application and service population.