This study evaluated the outcome and process of a community-based aging intervention program for the elderly in Taiwan. The program included education on nutrition and dietary behavior and on physical activities. Outcome and process evaluations were conducted. The program may have had some effects on decreasing some dietary behavioral problems and increasing regular exercise, but the effect on health outcome was not proved. The strength of this program was its proper design, dosage, and implementation; the weaknesses included a low participation rate, low commitment and continuity, and selection bias for the nonparticipants who might be frailer than the actual participants. (Contains 1 figure and 5 tables.)