This study explores the effect of mobile health combined with multi-course intervention on frailty, muscle strength, health literacy and nutrition knowledge among the elderly in the community. A longitudinal, repeated test quasi-experimental design was adopted to convenient sampling. Four community care bases in northern Taiwan were selected, and 2 experimental groups and 2 control groups were assigned by computer lottery to participate in the study. 60 in the experimental group and 60 in the control group. The experimental group received the combination of mobile health and multi-course intervention, and the control group only received the intervention of multi-course. The three measurement time points of the tracking effect of the two groups were: before intervention, after 4-times interventions, and after 12-times interventions. The following data were collected in the two groups: frailty assessment, grip strength, lower limb muscle strength, health literacy scale and nutrition knowledge scale. Statistical data were analyzed by SPSS26.0 software. Descriptive statistics include: percentage, mean, standard deviation; inferential statistics include: independent sample t test, chi-square test, generalized estimation model.