The invention provides an imaging system and an imaging method. The imaging system comprises a signal generation device, an imaging signal generator and an imaging signal acquiring and processing device, wherein the signal generation device is used for generating ultrasonic waves and laser with at least two wavelengths, and transmitting the ultrasonic waves and the laser with at least two wavelengths into the imaging signal generator; the imaging signal generator is used for receiving the ultrasonic waves and the laser with at least two wavelengths, enabling the ultrasonic waves and the laser with at least two wavelengths to play on a sample, receiving an imaging signal produced by using the ultrasonic waves or the laser to play on the sample, and sending the imaging signal to the imaging signal acquiring and processing device; the imaging signal acquiring and processing device is used for receiving the imaging signal and processing the received imaging signal so as to obtain an image corresponding to the imaging signal. After the imaging system and the imaging method are adopted, multiple modes of imaging can be realized, so that the defects of a single imaging mode are made up; the system and the method can realize high resolution imaging and multi-scale imaging at the same time; the obtained image is rich in information and more ideal.