Dual sensor imaging system and imaging method thereof

A dual sensor imaging system and an imaging method thereof are provided. The method includes following steps: identifying an imaging scene; controlling a color sensor and an IR sensor to respectively capture multiple color images and multiple IR images using multiple capturing conditions under the imaging scene; calculating a signal-to-noise ratio (SNR) difference between each color image and the IR images and a luminance mean value of each color image; selecting the color image and the IR image captured under the capturing condition having the SNR difference lower than or equal to a SNR threshold and having the luminance mean value higher than or equal to a luminance threshold for performing a feature domain transformation, so as to extract partial details of the imaging scene; and fusing the selected color image and IR image to adjust the partial details of the color image with a guidance of the partial details of the IR image, so as to obtain a scene image with full details of the imaging scene.