An electronic device and a method for unlocking a screen of the electronic device are provided. The electronic device includes a screen and a storage unit. The method includes detecting, in a screen-locked state, intent of a user to unlock the screen; if it is detected that the user intends to unlock the screen, extracting contact information from the storage unit of the electronic device, where the extracted contact information includes a first attribute value and a second attribute value; displaying the first attribute value of the extracted contact information on the screen and prompting the user to input a second attribute value; and detecting an input of the user, and comparing the input of the user with the second attribute value; if the input of the user is the same as the second attribute value, unlocking the screen; and otherwise, maintaining the screen-locked state.