The construction of a social psychological service system is an important part of nationalinnovative social governance, and valuable experience has been accumulated in various aspects suchas working mechanisms and system construction. At present, the overall demand intensity for socialpsychological services among the public is increasing, and the trend of personalized demand is obvious.However, there is a shortage of professional personnel and institutions, and there is an urgent needfor more convenient and efficient psychological self-help technologies to meet the self maintenance ofnational mental health. Expressive Writing (EW) is a psychological intervention technique that is easy tooperate, cost-effective, and effective, with great potential for application in various scenarios and groups.In the construction of a self-service system for social psychological services in the new era, traditionalexpressive writing can be integrated with excellent traditional Chinese culture, other psychologicalintervention methods, internet technology, etc. for application innovation, providing the public with morescientific, feasible, and convenient social psychological service self-service intervention technologies.