The invention discloses a method and a device for performing ultrasonic imaging on a target area. The ultrasonic imaging method includes sending a first ultrasonic pulse and receiving a first ultrasonic echo signal, sending a second ultrasonic pulse and receiving a second ultrasonic echo signal, sending a third ultrasonic pulse and receiving a third ultrasonic echo signal, extracting an echo signal component according to the first ultrasonic echo signal, the second ultrasonic echo signal and the third ultrasonic echo signal, and generating an ultrasonic image of the target area according to the echo signal component, wherein the amplitude weight of the third ultrasonic pulse is equal to the sum of the amplitude weight of the first ultrasonic pulse and the amplitude weight of the second ultrasonic pulse. The plurality of ultrasonic echo signals are processed and modulated, asymmetric components of even order nonlinear components and odd order nonlinear components in the ultrasonic echo signals are enabled to be separated from symmetric components of linear components and the odd order nonlinear components, and the asymmetric components and/or the even order nonlinear components of the odd order nonlinear components can be conveniently extracted from the ultrasonic echo signals.