A make-up assisting method implemented by a make-up assisting device is disclosed, wherein the make-up assisting device (1) has a reflecting mirror (11), an image capturing unit (13) and a display unit (12) arranged behind the reflecting mirror (11). The make-up assisting method includes steps of: reflecting user's face image (110) through the reflecting mirror (11) and controlling the image capturing unit (13) to execute an image recording procedure toward the user when the make-up assisting device (1) enters a make-up assisting mode; obtaining video content information (162) corresponding to user's current make-up procedure; displaying the video content information (162) on a first assisting interface (121) of the display unit (12), wherein the first assisting interface (121) does not overlap with the face image; and, terminating the image recording procedure to generate a recorded video (163) when the make-up procedure is completed.