The present invention relates to a face-lifting method using bidirectional needles formed on both sides of a face-lifting thread and a functional bidirectional face-lifting needle for forming needles on both sides of a face-lifting thread to lift a part where sagging of an eyelid or sagging of a facial surface occurs, and for lifting a desired part to a desired position. The face-lifting method using bidirectional needles formed on both sides of a face-lifting thread comprises: a sagging position display and face-lifting insertion position display step (S1) of displaying a position to be treated on a face or the like of a body by a pen； a face-lifting thread insertion part partial anesthetic step (S2) of performing an anesthetic operation on a face-lifting thread insertion part after the step of displaying a part to lift where a skin sags by using a pen is completed； a needle insertion position perforation step (S3) of perforating a needle insertion position after the partial anesthetic step is completed； a bottom surface face-lifting thread insertion step (S4) of inserting a face-lifting thread to a bottom surface which is a horizontal surface after the needle insertion position is perforated； a bottom surface lifting step after insertion of the face-lifting thread to the bottom surface (S5) of lifting the face-lifting thread on the horizontal surface after the face-lifting thread is inserted to the bottom surface； a left surface face-lifting thread insertion step (S6) of lifting the face-lifting thread to an upper part after the bottom surface lifting step is completed； a right surface face-lifting thread insertion step (S7)； and a binding step after insertion of the face-lifting thread to the bottom surface and the left and right surfaces (S8) of binding the face-lifting thread after the bottom surface and the left and right surfaces of the face-lifting thread are lifted. Thus, the face-lifting method of the present invention is convenient and capable of reducing
