An image sensor device and a signal processing method thereof are provided. The image sensor includes a plurality of pixels, and at least one pixel of the plurality of pixels includes a micro lens, a filter which includes a first area for filtering a first color signal from a light signal transmitted through the micro lens, and a second area for filtering a second color signal from the transmitted signal, and a first photodiode for converting the first color signal into an electric signal, and a second photodiode for converting the second color signal into an electric signal.