The quadcopter, which is basically used as the top viewer picture taker, in this research will be used as a device to carry the laser rangefinder to measure the obstacle height on the communication path between the location points of near end to far end. The obstacle height reading results were transmitted using a 5.8 GHz wireless transceiver to the monitoring center in real time. The data received were then processed to be displayed in graphical form, which shows obstacle height as a function of line of sight communication distance. The test results show that this device is very helpful in line of sight survey work, especially for monitoring obstacle height on the communication pathway with an accuracy of more than 90%. This device is very efficient because without using a 3-dimensional map the highest obstacle can be detected so that it can be used as a basis for determining the high position of a microwave communication antenna with clearence status.