The present invention discloses an image sensor, specifically a full spectrum recognition image sensor capable of reading and recognition image information for all of ultraviolet light, visible light and infrared light, which comprises a sensor substrate, photosensitive parts set on the sensor substrate and arranged in a straight line, a lens set on an upper portion of the sensor substrate, a light source set beside the lens, and a framework capable of accommodating said sensor substrate, said lens and said light source. A light-transmitting plate for carrying an original is set on an upper portion of the framework, the light source is a full spectrum light source capable of emitting light including ultraviolet light, visible light and infrared light, and the photosensitive parts on the sensor substrate consist of two parts, one part of which is a reflected light photosensitive part for receiving reflected light information generated by irradiating an original with the light source and another part of which is an exciting light photosensitive part for receiving exciting light information generated by irradiating an original with the light source. The image sensor of the present invention not only can recognize general color images, but also can recognize forgery-prevention images for various special purposes, and thus greatly improve the functions and the application field of the image sensor.