In this study, we target demand-responsive smart mobility, i.e., a bus-type rural transportation model, that has recently been activated to target public transportation-vulnerable areas in urban-rural integrated cities, and empirically analyze the effects of travel time and service factors on user satisfaction with the transportation mode. An ordered logit model was used for the empirical analysis of a field survey of 449 passengers regarding their usage status and satisfaction with demand-responsive smart mobility in rural areas across the country. As access and travel times increased, bus user satisfaction decreased. Particularly, access time was approximately 1.6 times more important than travel time. Meanwhile, satisfaction with demand-responsive smart mobility was found to increase as drivers were kind and drove safely, vehicles were convenient and ran on time, lines and stops were appropriate, fares were satisfactory, and information on schedules and how to use them was available. Among these service elements, the kindness of the driver was analyzed as the most important variable. This suggests that to activate the use of demand-responsive smart mobility, considering the selection of pick-up and drop-off locations to reduce access time and to make efforts to increase the kindness of drivers is important. The essential flexible schedule of demand-responsive smart mobility, i.e., the use of demand-responsive smart mobility, can be activated only when an operating environment is created that reduces access time and in-vehicle travel time. In other words, it is difficult to revitalize the use of demand-responsive smart mobility if it operates on a fixed route and schedules similar to those of existing buses.