A certificate transfer system , comprising a first certificate management host , a certificate transfer management host , a second certificate management host and an electronic device , wherein: the first certificate management host is configured to generate a first certificate, sign an electronic device with the first certificate, and transmit a first Internet address to the electronic device to complete a certificate-issuance operation; and the certificate transfer management host is configured to store a transfer device list and a second Internet address; wherein when the first certificate management host receives the first certificate issued by the electronic device , the first certificate management host is configured to verify that the first certificate is correct and to determine that if the first certificate matches one of the certificates in the transfer device list, the first certificate management host is configured to return a certificate transfer management host address to the electronic device , the electronic device is configured to send the first certificate to the certificate transfer management host according to the certificate transfer management host address, and the certificate transfer management host is configured to verify that the first certificate is correct, and then the certificate transfer management host is configured to send the second Internet address to the electronic device ; wherein the electronic device is configured to transmit the first certificate to a second certificate management host according to the second Internet address; after the second certificate management host verifies that the first certificate is correct, the second certificate management host is configured to issue a second certificate, and to transmit the second certificate to the electronic device , and the electronic device is configured to send a connection request to the second certificate management host using the second certificate. the first certificate management host is configured to generate a first certificate, sign an electronic device with the first certificate, and transmit a first Internet address to the electronic device to complete a certificate-issuance operation; and the certificate transfer management host is configured to store a transfer device list and a second Internet address; wherein when the first certificate management host receives the first certificate issued by the electronic device , the first certificate management host is configured to verify that the first certificate is correct and to determine that if the first certificate matches one of the certificates in the transfer device list, the first certificate management host is configured to return a certificate transfer management host address to the electronic device , the electronic device is configured to send the first certificate to the certificate transfer management host according to the certificate transfer management host address, and the certificate transfer management host is configured to verify that the first certificate is correct, and then the certificate transfer management host is configured to send the second Internet address to the electronic device ; wherein the electronic device is configured to transmit the first certificate to a second certificate management host according to the second Internet address; after the second certificate management host verifies that the first certificate is correct, the second certificate management host is configured to issue a second certificate, and to transmit the second certificate to the electronic device , and the electronic device is configured to send a connection request to the second certificate management host using the second certificate. <EOS>