Painting is a well-known method for alleviating stress, but it is uncertain whether family caregivers can use an electronic painting platform at home for this purpose. Aim. The aim in this study was to assess the feasibility and acceptability of having family caregivers of persons with dementia (FCPWD) draw electronic paintings using a mobile app, and to assess the preliminary effect of the intervention on their well-being. Methods. This was a two-phase feasibility and acceptability study, with qualitative interviews conducted in Phase 1 and qualitative interviews and a quantitative survey conducted in Phase 2. Caregiving burden, depressive symptoms, self-rated health, and social support were measured before and after the intervention. Participants were asked to draw electronic paintings at any time they liked, and to share the paintings with friends or relatives if they wished. Result. The recruitment rate in Phase 2 was 87.5% (28 out of 32), with 78.6% participants (22 out 28) completing all activities in 8 weeks. The FCPWD regarded the e-painting app as an appropriate channel for expressing their emotions. They found the layout of the app to be easy to use and were satisfied with it. A total of 116 pictures were produced. Log-in frequency was significantly correlated with the sharing of paintings with friends or relatives (r = 0.72, p < 0.001). Conclusion. FCPWD considered the e-painting mobile app to be a feasible and acceptable technology-based psychosocial platform. A further investigation with a larger sample in a full-scale randomized controlled trial is warranted.