Due to the high concentration of urban population and environmental problems such as traffic, waste, and air pollution with urbanization, WHO initiated a healthy city plan in 1986 and proposed 32 quantifiable indicators to underpin healthy city policy formulation for cities. Afterward, the Kaohsiung City Government incorporated “local indicators” reflecting the environment and culture of Kaohsiung City into the indicators and constructed healthy city indicators specific to Kaohsiung City. However, since the development of healthy cities in Taiwanese cities, there has been little research to examine promotion performance among cities and integrate residents’ needs, leading to difficulty in evaluating healthy city policies. Therefore, this study aimed to establish an analytical framework that could examine the promotion performance of healthy cities across time and space and identify the implementation priority of indicators to evaluate the promotion performance of the healthy city in Kaohsiung City and propose development strategies. Regarding research methods, the values of healthy city indicators were collected through the statistical database of open government data, and the historical growth rate of indicators (2004-2021) and cross-city standardized scores (six municipalities in Taiwan) were calculated to inspect health city policy performance. Then, through a face-to-face questionnaire survey, the perceived importance of the indicators to residents in the Kaohsiung urban area was collected; subsequently, an importance-performance analysis was used to integrate the residents’ perceived importance and the aforementioned policy performance to provide the priority of governance improvement. Research results showed that, in “cross-city policy performance,” Kaohsiung’s indicators of “popularity of tap water,” “sewage and sewerage,” “police and political security,” “air pollution,” and “quality of drinking water” were worse than the average of the six municipalities, but residents’ perceived importance levels of these indicators were high. Thus, these indicators could be regarded as “concentration improvement.” Therein, the indicators of “drinking water quality” had shown negative development in Kaohsiung City’s “historical growth rate policy performance,” and thus, they could be regarded as inferior indicators for healthy city development of Kaohsiung City and should be prioritized for the city government’s resource investment.