The present study intends to develop and validate a multidimensional evaluation standard for customers' participation in corporate social responsibility (CSR) value co-creation (VCC), which has grown exponentially since the start of the Internet commonweal platform era. A Delphi study was conducted with a group of 30 professionals and local community members. Initial items for measuring CSR VCC were derived from the Delphi study. These items were then used to devise a questionnaire that was ultimately administered to 844 customers. Exploratory and confirmatory factor analysis resulted in 28 items based on five factors: customer participation, customer response, corporate response, interaction, and sustainability. Both convergent validity and discriminant validity were verified between factors. Finally, structural equation modeling was used to verify the nomological validity of the scale. This evaluation scale is expected to provide a criterion that can help companies effectively manage CSR aspects of corporate-customer VCC and help customers choose CSR campaigns they can trust.