The invention discloses a photoreceptive sun-shading adjusting system, which comprises a wall body. A storage cavity which communicates in the front-rear direction is formed in the wall body, and a plurality of sun-shading pieces capable of sliding vertically and swinging are arranged in the storage cavity; the left ends and the right ends of the sun-shading pieces are symmetrical, and front fixing rods are hinged to the left ends and the right ends of the sun-shading pieces; and meanwhile, the left ends and the right ends of the sun-shading pieces are symmetrical, and rear fixing rods are hinged to the left ends and the right ends of the sun-shading pieces. Through the magnitude of the illumination intensity and the size of the illuminated area of a window, the descending distance of a curtain can be automatically adjusted, the angle of curtain blades can be changed, thus the effective sun-shading effect is achieved, and by designing a water outlet hole, the window can generate a better cooling effect.