Because of the good “four resistances” capabilities, non-cooperative reconnaissance and positioning systems based on radar emitters have become a research hotspot in the field of electronic warfare. Nevertheless, the characteristics of the space-time frequency of non-cooperative radiation sources are unknown, and then it brings a series of technical problems that need to be solved. Some key technologies such as radiation source reconnaissance guidance, system time-scale extraction and weak signal processing, are studied based on the principle of non-cooperative reconnaissance and positioning technology. The engineering prototype is completed as well. The engineering feasibility of non-cooperative reconnaissance positioning technology can be verified by the results of the field test.