A method for controlling water output of a water purifier is provided. The method includes: determining whether a container is placed in a water collecting region of the water purifier; determining whether there is a content in the container when the container is placed in the water collecting region; acquiring recognition information of the container when there is no content in the container, and determining category information of the container based on the recognition information; determining water output type information corresponding to the container as reference water output type information based on the category information of the container; acquiring content information of the container when there is content in the container, and determining category information of the content based on the content information; and determining water output type information corresponding to the content as reference water output type information based on the category information of the content.