In some scenes, such as street fighting, combatting terrorism in the city and the need for personnel hidden places, the warfighter can not go into the detection area with through-the-wall radar device. Therefore, the realization of remote assistance system for through-the-wall radar device to judge the situation of the regional staff is imperative. In this paper, a through-the-wall radar's remote assistance system based on wireless network security communication is designed and implemented. Via collecting data from the security wireless network and intelligent program analysis, the remote assistance system can give more accurate and comprehensive judgment for the situation of the regional staff. The effectiveness of this method is proved by the experiment results at the end.