With the trend of increasing international academic exchange, the number of international students in Sweden continues to expand over years. The stress faced by international students has attracted more and more attention from university organizations and the society. This project takes the current mental health-care service for international students at Linnaeus University as the research object. Based on the participatory design and service design theory, challenges faced by the international student health-care service system and improvement opportunities were investigated through a stakeholder map, semi-structured interviews, observations, questionnaires and co-creation workshops among other methods. By introducing participatory design into the development process, an improved mental health-care service system with integrated online and offline information is presented as an example for universities’ organizations for improving the mental health-care service for international students.