Account information determination method and device and server

The invention discloses an account information determination method and device and a server. The account information determination method comprises the following steps: obtaining a first account set which has been transacted with a target bank card in the trading system, wherein the target bank card is a bank card which is not contracted into the trading system and the bank card is a bank card which has been transacted with the target bank card in the trading system; obtaining a second set of accounts that have transacted transactions with accounts in the first set of accounts; determining target account information corresponding to the target bank card in the trading system according to the first account set and the second account set. 本发明公开种账户信息确定方法、装置及服务器，所述账户信息确定方法包括：在所述交易系统中获取与目标银行卡发生过交易的第账户集合，所述目标银行卡为未签约到所述交易系统中的银行卡；获得与所述第账户集合中的账户发生过交易的第二账户集合；根据所述第账户集合以及所述第二账户集合，确定所述交易系统中与所述目标银行卡对应的目标账户信息。