Superamphiphobic surfaces have advantages over common superhydrophobic surfaces because of their superrepellency for both water and oil. Besides, Al is a common metal and widely used in many areas, such as the aerospace and radio industry. A facial chemical etching and fluorination method was developed to fabricate superhydrophobic and superoleophobic surface (the water contact angle is 154.9 degrees and the glycerin contact angle is 147.9 degrees) on aluminum substrate. The resultant surfaces were characterized by optical methods, water contact angle (CA), scanning electron microscopy (SEM), and X-ray diffraction (XRD) analysis. The effect of etching time on the wettability was also discussed, which also indicated that surface roughness is an important factor for surface wettability since the etching time can affect it.