Many kinds of UAVs were used throughout the conflict in Nagorno-Karabakh in 2020.The UAVs strike a lot of tactical targets,and play an important role in effecting on battlefield situation.By analyzing the main UAVs' performance of Azerbaijan,the operational mode and typical attack and defense cases are analyzed.The suggestion for capability demand on ground-to-air anti-UAVs is provided based on the reason of failure in Armenia anti-air operation.This conclusion supports development and operation of ground-to-air anti-UAVs equipment.