The purpose of this study is to investigate the effect of the Life Review Program-Taiwan (LRP-TW) on outpatients with mild to moderate dementia. Ten individuals were selected through purposive sampling and tested using a single group pretest-posttest design. The Mini-Mental State Examination (MMSE), the Loewenstein Occupational Therapy Cognitive Assessment-Geriatric (LOTCA-G) and the Geriatric Depression Scale-Short Form (GDS-SF) were used as outcome measures. The total scores and three subtests of the LOTCA-G revealed significant differences after the intervention. Affective function remained stable through the experiment. The LRP-TW may offer a clinical intervention program for supporting cognitive and mental performance in individuals with dementia.