these methods have their limitations. The equipment required for micromachining, electron beam lithography and femtosecond laser etching is expensive, which leads to high costs to produce micro/nanoscale stripe array structures. The cost of soft lithography is comparatively lower, but this method is not applicable to hard substrates, such as metals and ceramics.Superhydrophobic surfaces, on which the water contact angle (CA) is above 150° and the water sliding angle (SA) is below 10°, have attracted much attention due to their wide applications in corrosion resistance, [9] water/fog collection, [10] bubbles collection, [11] anti-icing, [12] and water/oil separation. [13] A large number of methods have been adopted to fabricate superhydrophobic surfaces, such as lithographic etching, [12c,14] spray-coating, [15] electrochemical corrosion, [10b,11b] and chemical treatment. [16] These methods have the same purposes of increasing the roughness and lowering the surface energy of the surfaces, which are supposed necessary for a surface to achieve superhydrophobicity. [17] To increase the surface roughness, a hierarchical structure is often adopted. In general, a hierarchical structure contains microstructures and nanostructures coated on the microstructures. Thus, the micro/nanoscale stripe array structure introduced above may also contribute to increasing the superhydrophobicity of a surface.Herein, we introduced a novel method with low cost, high precision, and good controllability for fabricating microscale stripe array structures on metal (almost all types of metal) substrates by corroding dissimilar metal diffusion bonds and grew nanostructures on the stripe bulges to increase the superhydrophobicity of the surface. The CAs and SAs were measured in the directions parallel and perpendicular to the grooves, respectively. The micro and nanostructures of the surface were studied. The effects of the depth and width of the grooves on the CAs and SAs were studied in detail, and the mechanism was analyzed. Furthermore, we built a magnetic control microdroplet release system based on the as-prepared superhydrophobic metal-substrate surface, which extends the application range of the reported system. [18]