Purpose This study aims to develop a web-based education program among cancer patients undergoing treatment of systemic chemotherapy and to evaluate the effect of the program on symptom control, quality of life, self-efficacy, and depression. Methods A web-based education program was prepared in line with patient needs, evidence-based guidelines, and expert opinions and tested with 10 cancer patients. A single-blind, randomised controlled study design was applied at a medical oncology unit of a university hospital. Pretests were applied to 60 cancer patients undergoing systemic chemotherapy, and the patients (intervention:30, control: 30) were randomized. The intervention group used the web-based education program for three months, and they were allowed to communicate with researchers 24/7 via the website. The effectiveness of the web-based education program at baseline and after 12 weeks was evaluated. The CONSORT 2010 guideline was performed. Results Expert opinions were found to be compatible with each other (Kendall's Wa = 0.233, p=0.008). The difference between symptom control (p=0.026) and quality of life (p=0.001) during the three-month follow-up of the groups were statistically significant, and there was no difference between the groups in terms of self-efficacy and depression levels (p˃0.05). Conclusion The web-based education program was found to be effective in remote symptom management and improving the quality of life of cancer patients. Trial registration www.clinicaltrials.gov , NCT05076916 (12 October 2021, retrospectively registered)