The invention proposes an identity verifying method and device. The method comprises the steps: receiving a verification code pull request, transmitted by a user terminal, through a server; selecting at least two images according to the verification code pull request, and transmitting the images to the user terminal for display, wherein the images are corresponding to one effective verification code image which is formed by the jointing of at least two images according to a preset rule; receiving the jointing result, returned by the user terminal, of the images according to a user instruction, and judging whether the images are jointed according to the preset rule to form the effective verification code image or not according to the jointing result; returning an authorization verification message to the user terminal if the images are jointed according to the preset rule to form the effective verification code image, wherein the authorization verification message is used for reminding a user of inputting a verification code answer according to the jointed image; returning a verification rejecting message to the user terminal if the images are not jointed according to the preset rule to form the effective verification code image, and rejecting the identity verification.