To provide a virtual character fostering server in which the virtual character stored in the server grows in accordance with the operation of a user's terminal device without restricting the kind of the terminal device of the side of the user's terminal device and a function in a server-to-user terminal device system is enhanced in accordance with the grow of the virtual character.

This virtual character fostering method includes an authentication step (S2) performing a log-in processing, a renewal step (S4) updating the virtual character of a logged-in client, a transmission step (S6) transmitting the data expressing a picture and the data expressing an operation of the virtual character updated in the renewal step to the client, a presentation step (S10) which provides the service requested by the client and gives a character fostering point corresponding to the provided service and a questionnaire step (S16) which transmits a questionnaire to the logged-in client and gives a virtual character fostering point when it receives the answer to the questionnaire.