In order to strengthen the construction of low altitude security, a prison in H province hopes to build the capability of UAV monitoring and defense system. Our company uses TDOA passive radio positioning equipment+directional radio anti system equipment to build a UAV prevention and control system integrating detection, identification, positioning and anti system, provide the prison with 7 * 24 unattended normal UAV defense capability, and help the prison management unit win the first place in the "Smart Prison" construction evaluation, winning high praise from the Judicial Department of H Province.