The invention provides a method for controlling produced water of a water purifier, an apparatus thereof, and a water purifier. The method concretely comprises the following steps: determining the class of a container when the container is disposed in a water receiving area and the container contains no content are judged; judging the produced water type matching with the container as a reference produced water type based on the class of the container; determining the class of the content when the container contains content; judging the produced water type matching with the content as a reference produced water type based on the class of the content; determining corresponding produced water path information according to the information of the reference produced water type; and controlling the water purifier to produce water according to the produced water path according to the information of the produced water path. The water purifier in the embodiment can automatically produce water with the quality corresponding to the water receiving container or the content according to practical conditions without selecting the produced water type by a user, so the use efficiency of the water purifier is improved.