An information registering method comprising: requesting, by an IC card management server that stores card identification information, a SIM management server to make an inquiry regarding a user based on user information, the user information relating to a contract of a SIM card, and a secret key in association with each other; making the inquiry, by the SIM management server, by comparing a user name and a telephone number with the user information relating to the contract of the SIM card stored in the SIM management server; determining validity of the user based on the result of the comparison, by the SIM management server; transmitting, by the SIM management server, a result of determination of the validity of the user to the IC card management server; transmitting, by the IC card management server, a generation request for generating a registration application registering biometric authentication information based on biometric information of the user, together with the card identification information and the secret key, to the SIM management server in a case that validity of the user is verified by the SIM management server; generating, by the SIM management server, a registration application using the card identification information and the secret key; notifying, by the SIM management server, a terminal device of a notification of download of the registration application; downloading, by the SIM management server, the registration application to the SIM card of the terminal device, upon receipt of a request for downloading the registration application, wherein the registration application allows the SIM card to communicate via the terminal device with an IC card storing the card identification information, the secret key and the biometric authentication information, and wherein the registration application allows the SIM card in the terminal to authentication process using the card identification information and the secret key, and the registration application allows the SIM card to generate a session key on the basis of the secret key; executing an authentication process by the SIM card with the IC card using the card identification information and the secret key; communicating, by the IC card that includes a data storage storing the card identification information, the secret key and the biometric authentication information of the user (Sill), with the SIM card on the basis of the registration application; storing, into the data storage of the IC card, the biometric authentication information based on the biometric information acquired from the user in a case that the authentication is succeed based on the card identification information and the secret key through the communication with the SIM card. requesting, by an IC card management server that stores card identification information, a SIM management server to make an inquiry regarding a user based on user information, the user information relating to a contract of a SIM card, and a secret key in association with each other; making the inquiry, by the SIM management server, by comparing a user name and a telephone number with the user information relating to the contract of the SIM card stored in the SIM management server; determining validity of the user based on the result of the comparison, by the SIM management server; transmitting, by the SIM management server, a result of determination of the validity of the user to the IC card management server; transmitting, by the IC card management server, a generation request for generating a registration application registering biometric authentication information based on biometric information of the user, together with the card identification information and the secret key, to the SIM management server in a case that validity of the user is verified by the SIM management server; generating, by the SIM management server, a registration application using the card identification information and the secret key; notifying, by the SIM management server, a terminal device of a notification of download of the registration application; downloading, by the SIM management server, the registration application to the SIM card of the terminal device, upon receipt of a request for downloading the registration application, wherein the registration application allows the SIM card to communicate via the terminal device with an IC card storing the card identification information, the secret key and the biometric authentication information, and wherein the registration application allows the SIM card in the terminal to authentication process using the card identification information and the secret key, and the registration application allows the SIM card to generate a session key on the basis of the secret key; executing an authentication process by the SIM card with the IC card using the card identification information and the secret key; communicating, by the IC card that includes a data storage storing the card identification information, the secret key and the biometric authentication information of the user (Sill), with the SIM card on the basis of the registration application; storing, into the data storage of the IC card, the biometric authentication information based on the biometric information acquired from the user in a case that the authentication is succeed based on the card identification information and the secret key through the communication with the SIM card.