Digital health literacy is the capacity to access, understand, evaluate, and apply health information from electronic sources, which is an important attribute that everyone should possess. During the COVID-19 pandemic, DHL is an issue encountered by people of all ages, especially ethnic minorities, people with chronic illnesses, and caregivers. This study aims to develop Digital Health Literacy interventions, co-create the interventions with ethnic minorities, Chinese people with chronic illnesses and caregivers in Hong Kong, and assess the efficacy.