With　the　advent　of　Internet　of　Things　(IoTs)　and　wearable　devices,　manufacturing　requirements　have　shifted　toward　miniaturization,　flexibility,　environmentalization,　and　customization.　Inkjet　printing,　as　a　non-contact　picoliter-level　droplet　printing　technology,　can　achieve　material　deposition　at　the　microscopic　level,　helping　to　achieve　high　resolution　and　high　precision　patterned　design.　Meanwhile,　inkjet　printing　has　the　advantages　of　simple　process,　high　printing　efficiency,　mask-free　digital　printing,　and　direct　pattern　deposition,　and　is　gradually　emerging　as　a　promising　technology　to　meet　such　new　requirements.　However,　there　is　a　long　way　to　go　in　constructing　functional　materials　and　emerging　devices　due　to　the　uncommercialized　ink　materials,　complicated　film-forming　process,　and　geometrically/functionally　mismatched　interface,　limiting　film　quality　and　device　applications.　Herein,　recent　developments　in　working　mechanisms,　functional　ink　systems,　droplet　ejection　and　flight　process,　droplet　drying　process,　as　well　as　emerging　multifunctional　and　intelligence　applications　including　optics,　electronics,　sensors,　and　energy　storage　and　conversion　devices　is　reviewed.　Finally,　it　is　also　highlight　some　of　the　critical　challenges　and　research　opportunities.　The　review　is　anticipated　to　provide　a　systematic　comprehension　and　valuable　insights　for　inkjet　printing,　thereby　facilitating　the　advancement　of　their　emerging　applications.　Inkjet　printing,　a　non-contact　picoliter-level　droplet　printing　method　that　benefits　from　a　simple　procedure,　high　printing　efficiency,　mask-free　digital　printing,　and　direct　pattern　deposition,　is　gradually　emerging　as　a　promising　technology.　The　review　is　anticipated　to　provide　systematic　comprehension　and　valuable　insights　for　inkjet　printing,　thereby　facilitating　the　advancement　of　their　emerging　applications.　image