ACCOUNT INFORMATION OBTAINING METHOD, TERMINAL, SERVER AND SYSTEM

An account information obtaining method performed at a terminal includes the following steps: in response to a request of a current user of the terminal, invoking a social networking application running on the terminal to obtain biological information of a target user; extracting biological feature data from the biological information, and sending the biological feature data to a server; receiving, from the server, account information of the target user whose at least one associated biological feature data sample matches the biological feature data, and displaying the account information on the terminal; and in response to a selection of the account information by the current user of the terminal, adding the account information to a contact list of the current user's account at the social networking application so that the current user can communicate with the target user directly.