A radar information signal processing software and realization method is designed to satisfy the demands of signal sorting, recognizing, and comprehensive processing of reconnaissance system. General components of the software and design idea are discussed. Use C/C++ language to design the sorting algorithm which mainly by auto processing and partly by manual processing. Design emitter recognition algorithm based on confidence, use expert system to infer usage, technology, platform, and achieve target. Application results illustrate that the design satisfied the intelligence processing demands of reconnaissance system. It provides help for improving environment self-adaptation, task self-adaptation abilities for new-generation radar.