The aim of this paper is to narrow the gap between the theoretical findings from past studies and current open space development through evaluating the behavior pattern and landscape preferences of seniors in urban parks in China. Combining an on-site observational approach with a questionnaire, the research has taken place in two successful traditional comprehensive parks in Xi’an, Shaanxi, China. The results for time, place, and activities were analyzed and depicted in figures. Design guidelines have been provided based on the analysis; new perspectives for further investigations have been pointed out for landscape architects and urban planners to carry on exploring the process of establishing a successful age-friendly outdoor space.