This　paper　presents　an　economic　method,　based　on　electrically　templated　dewetting　of　a　UV-curable　prepolymer,　for　fabricating　a　concave　microlens　array　(MLA)　of　high　quality　and　high　density.　In　our　strategy,　a　voltage　is　applied　to　an　electrode　pair　consisting　of　a　conductive　substrate　coated　with　a　UV-curable　prepolymer　film　and　a　microhole-arrayed　silicon　template,　sandwiching　an　air　gap,　to　dewet　the　prepolymer　film　into　a　curved　air-liquid　interface.　At　or　beyond　a　critical　voltage,　the　curved　prepolymer　can　be　pulled　quickly　into　contact　with　the　protrusive　underside　of　the　silicon　template.　Contact　of　the　prepolymer　with　the　template　can　be　detected　by　monitoring　the　leaky　current　in　the　polymer,　followed　by　a　UV　curing　of　the　prepolymer.　Finally,　by　separating　the　mold　from　the　solidified　polymer,　a　concave　MLA　is　obtained.　The　curvature　of　the　MLA　can　be　well-defined　simply　by　changing　the　air　gap　between　the　mold　and　prepolymer　film.　Besides,　the　dewetting　strategy　results　in　a　much　smaller　adhesion　area　between　the　mold　and　solidified　polymer　structures,　which　allows　for　easy　separation　of　the　mold　from　the　MLA　in　a　large-area　operation.