An information displaying method for a terminal device, wherein the method comprises: obtaining program information, and generating the prompt information based on the program information when the terminal device is in a screen-locked state and in a black-screen state, wherein the program information comprises system program information or application program information; and the prompt information is used to inform a user that there is unread information; displaying the prompt information on a screen of the terminal device and collecting face image information by using a camera of the terminal device when the screen is woken up by the program information, wherein the terminal device is still in the screen-locked state; and if the face image information matches face image information pre-stored in the terminal device, displaying (S705-1), on the screen of the terminal device, content information corresponding to the prompt information; and, obtaining screen unlock information, wherein the screen unlock information includes one of the following information: voice information, fingerprint information, text information, or screen touch information; releasing the screen-locked state of the terminal device if the screen unlock information matches preset screen unlocking information, so that the terminal device enters a normal access state; if the face image information does not match the face image information pre-stored in the terminal device, skipping displaying (S705-2), on the screen of the terminal device, the content information corresponding to the prompt information; and, if a fixed time expires, ending collecting face image information; if a related instruction is not received within a long time, the screen enters a black-screen state, then, triggering the camera to collect a new face image again when the screen is woken up by a related instruction, and the prompt information is displayed on the display screen again, wherein the new face image is used to determine whether to display the content information corresponding to the prompt information. obtaining program information, and generating the prompt information based on the program information when the terminal device is in a screen-locked state and in a black-screen state, wherein the program information comprises system program information or application program information; and the prompt information is used to inform a user that there is unread information; displaying the prompt information on a screen of the terminal device and collecting face image information by using a camera of the terminal device when the screen is woken up by the program information, wherein the terminal device is still in the screen-locked state; and if the face image information matches face image information pre-stored in the terminal device, displaying (S705-1), on the screen of the terminal device, content information corresponding to the prompt information; and, obtaining screen unlock information, wherein the screen unlock information includes one of the following information: voice information, fingerprint information, text information, or screen touch information; releasing the screen-locked state of the terminal device if the screen unlock information matches preset screen unlocking information, so that the terminal device enters a normal access state; displaying (S705-1), on the screen of the terminal device, content information corresponding to the prompt information; and, obtaining screen unlock information, wherein the screen unlock information includes one of the following information: voice information, fingerprint information, text information, or screen touch information; releasing the screen-locked state of the terminal device if the screen unlock information matches preset screen unlocking information, so that the terminal device enters a normal access state; if the face image information does not match the face image information pre-stored in the terminal device, skipping displaying (S705-2), on the screen of the terminal device, the content information corresponding to the prompt information; and, if a fixed time expires, ending collecting face image information; if a related instruction is not received within a long time, the screen enters a black-screen state, then, triggering the camera to collect a new face image again when the screen is woken up by a related instruction, and the prompt information is displayed on the display screen again, wherein the new face image is used to determine whether to display the content information corresponding to the prompt information. skipping displaying (S705-2), on the screen of the terminal device, the content information corresponding to the prompt information; and, if a fixed time expires, ending collecting face image information; if a related instruction is not received within a long time, the screen enters a black-screen state, then, triggering the camera to collect a new face image again when the screen is woken up by a related instruction, and the prompt information is displayed on the display screen again, wherein the new face image is used to determine whether to display the content information corresponding to the prompt information.