The invention discloses a trade order confirmation method and device and a server. The effectiveness verification is carried out on a merchant and order information by responding to the order information sent by the merchant, and order validity is confirmed primarily; when the merchant and the order information pass the effectiveness verification, order information is signed, order signature data are generated, and a bar code is generated by the utilization of the order signature data and sent to the merchant so that the merchant can display the bar code to a consumer; through signature processing, the generated bar code has uniqueness and can not be tampered by other people; bar code scanning data sent by the consumer are received, whether the bar code scanning data are the same with the order signature data or not is judged, it is determined that the order information is legal if the bar code scanning data are the same with the order signature data, and it is determined that the order information is not legal if the bar code scanning data are not the same with the order signature data. By comparing the bar code scanning data fed back by the consumer with the order signature data, the problem that as phishing software fakes orders, financial security of users is affected is solved.