Abstract: A method of identity authentication for an online store includes steps of transmitting a device code of a first electronic device to a first server, and waiting to receive an authentication code sending back from the first server; establishing a web page corresponding to the authentication code on a second server via the first electronic device; generating a link information corresponding to the web page by the first electronic device; obtaining the link information by the second electronic device, and connecting the second electronic device to the web page according to the link information whereby, it can effectively verify the authenticity of the first electronic device so as to bind the web page to the first electronic device, which can improve the transaction security.