Latest advances have witnessed the laser induction process on polyimide (PI) films for the formation of porous graphene.Herein,a fully converted graphene film was prepared by Nd:YAG laser scribing a gelatin coated PI film.It was found that the gelatin played the role of “shield” well in absorbing intense laser impact and benefit for the surface morphology modulation.Laser treatment lower than a critical fluence point of～4.00 J mm-2 contributed to a crater-like surface morphology due to the dispersed nature of Nd:YAG laser beam.By tuning laser fluence above the threshold,carbonized surface turned into continuous mor-phology.A fluid dynamics process accompanied by outgassing occurred during the carbonization,and the surface morphology gradually varied from stretched droplets to porous strips and finally to amorphous porous structures.The morphology evolution in combination with surface chemistry is responsible for the significant wettability transition from superhydrophobic to su-perhydrophilic,and a Janus superhydrophobic/superhydrophilic surface wettability was achieved under a laser fluence of～8.00 J mm-2.Eventually,microsupercapacitors (MSCs) were fabricated to show the great potential of our prepared graphene in flexible electronics.