A method of controlling a cluster of solar trackers in which a plurality of solar trackers exist as a cluster shape, the method comprising: detecting, by each of the solar trackers of the cluster, one or more of power generation amount information, altitude information, and azimuth information thereof and transmitting the detected power generation amount information, altitude information, or azimuth information to a server; calculating, by the server, average power generation amount information, average altitude information, or average azimuth information using the power generation amount information, altitude information, or azimuth information of each of the solar trackers of the cluster; determining whether the cluster of solar trackers is normal by comparing the calculated average power generation amount information, average altitude information, or average azimuth information with the power generation amount information, altitude information, or azimuth information detected by each of the solar trackers of the cluster; detecting an insolation information of a place where the cluster of solar trackers is located, comparing, by the server, said insolation information with an insolation reference value; characterized in that the method further comprises transmitting, by the server, a first request signal for providing the power generation amount information, altitude information, or azimuth information to each of the solar trackers of the cluster when the insolation information of the place where the cluster of solar trackers is located is at or above the insolation reference value, wherein, in response to the first request signal, the cluster of solar trackers detects and transmits the power generation amount information, altitude information, or azimuth information to the server transmitting, by the server, a second request signal for providing global positioning system information with respect to each of the solar trackers of the cluster to each of the solar trackers of the cluster when the insolation information of the place where the cluster of solar trackers is located is less than the insolation reference value; detecting, by each of the solar trackers of the cluster, the GPS information thereof and transmitting the detected GPS information to the server; and controlling, by the server, an altitude and an azimuth of each of the solar trackers of the cluster by using the GPS information of each of the solar trackers of the cluster. detecting, by each of the solar trackers of the cluster, one or more of power generation amount information, altitude information, and azimuth information thereof and transmitting the detected power generation amount information, altitude information, or azimuth information to a server; calculating, by the server, average power generation amount information, average altitude information, or average azimuth information using the power generation amount information, altitude information, or azimuth information of each of the solar trackers of the cluster; determining whether the cluster of solar trackers is normal by comparing the calculated average power generation amount information, average altitude information, or average azimuth information with the power generation amount information, altitude information, or azimuth information detected by each of the solar trackers of the cluster; detecting an insolation information of a place where the cluster of solar trackers is located, comparing, by the server, said insolation information with an insolation reference value; characterized in that the method further comprises transmitting, by the server, a first request signal for providing the power generation amount information, altitude information, or azimuth information to each of the solar trackers of the cluster when the insolation information of the place where the cluster of solar trackers is located is at or above the insolation reference value, wherein, in response to the first request signal, the cluster of solar trackers detects and transmits the power generation amount information, altitude information, or azimuth information to the server transmitting, by the server, a second request signal for providing global positioning system information with respect to each of the solar trackers of the cluster to each of the solar trackers of the cluster when the insolation information of the place where the cluster of solar trackers is located is less than the insolation reference value; detecting, by each of the solar trackers of the cluster, the GPS information thereof and transmitting the detected GPS information to the server; and controlling, by the server, an altitude and an azimuth of each of the solar trackers of the cluster by using the GPS information of each of the solar trackers of the cluster.