The droplets with different dynamics exist in a variety of industry

including phase change heat transfer

micro-scale chemical engineering

spray cooling

pesticide spraying and microfluidic chip. Interface phenomena has been proved a very important factor for droplet dynamics

which is one of the arc in the field of droplet manipulation. In the past decades

researchers have carried out a series of scientific researches on multiscale wetting

interfacial effect-driven droplet dynamic behaviors

and achieved distinctive and innovative results. In this review

the theoretical basis of multi-scale wetting is presented firstly. Secondly

liquid-solid interfacial interactions in the process of the droplet nucleation

the wetting of liquid on nano and micro structures

droplet jumping

droplet multi-directional migration

and impact of droplet are discussed in detail. Meanwhile

the typical applications of droplet dynamics manipulation such as phase change heat transfer

inkjet printing

pesticide spraying

and microfluidic chip are introduced. Finally

the perspectives of the future development of droplet manipulation are proposed for further intensification and control of related industrial processes.