Electronic device capable of raising safety of trading

The utility model relates to an electronic device that can improve the safety of trading, which includes at least one certificate-granting device, at least one portable electronic device, at least one terminal processing cell and a credit granting management cell. Wherein the certificate-granting device is connected to the credit-granting management cell directly or via a telecommunication device and connected with the portable electronic device with the telecommunication device. The portable electronic device is connected with the terminal processing device via an electronic voucher reader or the radio-frequency signals. Accordingly, the safety and convenience in electronic trading can be effectively improved. In addition, the privacy of the users can be improved.