One purpose of the present invention is to provide a machine and a method for making rice noodle using wet noodles, which enable rice noodle to be made by using wet noodles instead of dry noodles. Other purpose of the present invention is to provide a machine and a method for making rice noodle using wet noodles, which are capable of promoting rice consumption through making of rice noodle with improved taste compared to existing dry noodles. A machine for making rice noodle using wet noodles according to the present invention includes: a mixer (110) which is installed on the top of one side of base (102), and through an opened top of which wet rice powder and water as raw materials are injected such that the wet rice powder and water are mixed a thickness adjusting part (120) which adjusts thickness of the injected wet noodles in a dough state through a connection rod of the mixer (110) a steam drum (130) which cooks wet noodles supplied through the thickness adjusting part (120) through a heater (132) a roller driving part which is installed in a state that the roller driving part is spaced apart from the steam drum (130), and which transfers wet noodles passing through the thickness adjusting part (120) through a conveyor belt (148) a wet noodle separation blade (150) which separates wet noodles in a cooked state moved along the conveyor belt (148) from the conveyor belt (148) a mesh conveyor belt (160) which is slantly installed under the wet noodle separation blade (150) and moves the wet noodles separated from the conveyor belt (148) a pair of left and right longitudinal cutting blades (180) which are installed under a guide roller (106) connected to the mesh conveyor belt (160) such that the longitudinal cutting blades (180) are rotatable oppositely to each other, and which longitudinally cut a plurality of the wet noodles transferred along the mesh conveyor belt (160) and a pair of left and right length adjusting blades (184) which are installed under the lo
