Provided are a sterilization method for liquids, whereby flavor deterioration can be suppressed while securing a sterilization effect, and a sterilization device. The sterilization method according to the present invention comprises irradiating a solution to be treated, which is a beverage other than water, substantially not with ultraviolet light with an emission wavelength of 260 nm or less but with ultraviolet light with an emission wavelength of 280-320 nm inclusive.
