Disclosed herein are a method and device for cloaking an acoustic wave. A method for cloaking an acoustic wave according to an embodiment of the present invention includes: transforming an acoustic propagation mathematical model, predetermined for the propagation of an acoustic wave, into an acoustic wave cloaking mathematical model corresponding to an electromagnetic wave mathematical model predetermined for an electromagnetic wave and including a time variable for time dependency, based on a correlation between the acoustic propagation mathematical model and the electromagnetic wave mathematical model; obtaining a target characteristic of a meta-material by using the acoustic wave cloaking mathematical model; and blocking a region including a target object, from an acoustic wave by disposing the meta-material having the obtained target characteristic to surround the region.