PURPOSE: An angle control device of a solar panel is provided to maximize sunlight collection efficiency by controlling an tilt angle of the solar panel according to the altitude of the sun. CONSTITUTION: A vertical support stand is vertically installed on the rear of a solar panel. A horizontal support stand(30) is horizontally installed on the vertical support stand of the rear of the solar panel. A lateral support stand(40) is installed on both sides of the horizontal support stand and includes a rotation shaft(41), an angle control hole(42), and a hitching protrusion(43). The angle of the solar panel is controlled by the angle control hole according to the altitude of the sun.
