A service provision system comprises a first terminal, a service computer, and a user registration module. The first terminal includes an application management module to which second identification information is assigned, for managing the application to which first identification information is assigned, and an anonymous personal data transmission module for transmitting the anonymous personal data including the first identification information and the second identification information. The user registration module transmits user registration data including the second identification information and third identification information, in a case of inputting third identification information. The service computer stores, in a case of receiving the anonymous personal data, the first identification information, the second identification information, and the anonymous personal data in association with each other, and stores, in a case of receiving the user registration data, the second identification information and the third identification information in association with each other.