A solar light detection device for a solar light tracker that performs altitude adjustment and horizontal rotation of a solar light collection panel in which a plurality of solar cells are installed to allow the solar light collection panel to face the sun, the solar light detection device comprising: an altitude adjustment sensor portion comprising one or more first sensors and one or more second sensors that sense solar light in a direction different from that of the first sensors; wherein the one or more first sensors are arranged in a first sector formed by a cross-shaped partition that divides a plate into four sectors (81, 82, 83, 84) and the one or more second sensors are arranged in a second sector symmetrical to the first sector based on a center point of the cross-shaped partition, and a horizontal rotation sensor portion comprising one or more third sensors and one or more fourth sensors that sense solar light in a direction different from that of the third sensors, wherein the one or more third sensors are arranged in a third sector formed by the cross-shaped partition and the one or more fourth sensors are arranged in a fourth sector symmetrical to the third sector based on the center point, characterized in that the first sensors and the second sensors are electrically connected in series and sense solar light to adjust an altitude of the solar light collection panel, the third sensors and the fourth sensors are electrically connected in series and sense solar light to horizontally rotate the solar light collection panel, wherein the one or more first sensors are arranged to be at a first tilt angle and the one or more second sensors are arranged to be at a second tilt angle, and wherein the one or more third sensors are arranged to be at a third tilt angle and the one or more fourth sensors are arranged to be at a fourth tilt angle. an altitude adjustment sensor portion comprising one or more first sensors and one or more second sensors that sense solar light in a direction different from that of the first sensors; wherein the one or more first sensors are arranged in a first sector formed by a cross-shaped partition that divides a plate into four sectors (81, 82, 83, 84) and the one or more second sensors are arranged in a second sector symmetrical to the first sector based on a center point of the cross-shaped partition, and a horizontal rotation sensor portion comprising one or more third sensors and one or more fourth sensors that sense solar light in a direction different from that of the third sensors, wherein the one or more third sensors are arranged in a third sector formed by the cross-shaped partition and the one or more fourth sensors are arranged in a fourth sector symmetrical to the third sector based on the center point, characterized in that the first sensors and the second sensors are electrically connected in series and sense solar light to adjust an altitude of the solar light collection panel, the third sensors and the fourth sensors are electrically connected in series and sense solar light to horizontally rotate the solar light collection panel, wherein the one or more first sensors are arranged to be at a first tilt angle and the one or more second sensors are arranged to be at a second tilt angle, and wherein the one or more third sensors are arranged to be at a third tilt angle and the one or more fourth sensors are arranged to be at a fourth tilt angle.