The invention discloses a prompting method and device for detergent recommended information, wherein the method comprises the following steps: acquiring washing information about washing machine operation parameters; determining a detergent corresponding to the washing information; outputting prompt information, wherein the prompt information comprises the determined detergent. Through the technical scheme, the washing information of a washing machine can be obtained to recommend the detergent which aims at the washing information. The prompting method for the detergent recommended information provided by the invention can provide convenience for choosing what kind of detergents to use when a user washes clothes by using the washing machine.