The invention discloses an electricity seller adjustable load decision-making method and system considering risk values. The method comprises the steps of collecting historical demand response information of adjustable load users and predicted market electricity prices; obtaining an adjustable load decision scheme of the electricity seller based on the collected historical demand response information, the predicted market electricity price information and a pre-constructed adjustable load decision model of the electricity seller; wherein the electricity seller adjustable load decision model comprises a risk value of user response deviation and a risk value of market electricity price prediction. According to the technical scheme provided by the invention, the revenue risk that an electricity seller adopts the adjustable load as a standby is reduced, and popularization and implementation of an adjustable load decision scheme are facilitated.