A method for controlling/regulating a fluid conveyer for conveying a fluid within a fluid line is provided. The method includes the steps, receiving information regarding a setpoint flow rate of the fluid within the fluid line, determining an energy consumption of the fluid conveyer during operation within a working range of the fluid conveyer, controlling the fluid conveyer, with regard to a generated flow of the fluid, on the basis of the information regarding the setpoint flow rate of the fluid within the fluid line in such a way that the setpoint flow rate of the fluid is stained and the energy consumption required for this is minimized, wherein it is taken into consideration that the working range of the fluid conveyer is bounded by a non-linear boundary. Also described is a corresponding device.
