A body information analysis apparatus (1) with augmented reality and an eyebrow shape preview method thereof are provided. The method includes following steps of: capturing a face image (51); recognizing an eye image from the face image (51); calculating a projection position (73) according to a position of the eye image and an eyebrow offset; displaying the face image (51) and a sample eyebrow image (81,82) at the projection position (73) in a preview mode; and, displaying the face image (51) and an outline eyebrow shape pattern (71,72) at the projection position (73) in an auxiliary mode. Therefore, the dissatisfaction for the shaped eyebrow shape from the user can be prevented, and the technical threshold of eyebrow-shaping can be reduced significantly, and a probability of shaping eyebrows successfully can be increased as well.